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t=this.popToken(),n=t.text,o=t.noexpand?null:this._getExpansion(n);if(null==o||e&&o.unexpandable){if(e&&null==o&&"\\"===n[0]&&!this.isDefined(n))throw new r("Undefined control sequence: "+n);return this.pushToken(t),!1}if(this.expansionCount++,this.expansionCount>this.settings.maxExpand)throw new r("Too many expansions: infinite loop or need to increase maxExpand setting");let a=o.tokens;const s=this.consumeArgs(o.numArgs,o.delimiters);if(o.numArgs){a=a.slice();for(let e=a.length-1;e>=0;--e){let t=a[e];if("#"===t.text){if(0===e)throw new r("Incomplete placeholder at end of macro body",t);if(t=a[--e],"#"===t.text)a.splice(e+1,1);else{if(!/^[1-9]$/.test(t.text))throw new r("Not a valid argument number",t);a.splice(e,2,...s[+t.text-1])}}}}return this.pushTokens(a),a.length}expandAfterFuture(){return this.expandOnce(),this.future()}expandNextToken(){for(;;)if(!1===this.expandOnce()){const e=this.stack.pop();return e.treatAsRelax&&(e.text="\\relax"),e}throw new Error}expandMacro(e){return this.macros.has(e)?this.expandTokens([new mt(e)]):void 0}expandTokens(e){const t=[],r=this.stack.length;for(this.pushTokens(e);this.stack.length>r;)if(!1===this.expandOnce(!0)){const e=this.stack.pop();e.treatAsRelax&&(e.noexpand=!1,e.treatAsRelax=!1),t.push(e)}return t}expandMacroAsText(e){const t=this.expandMacro(e);return t?t.map((e=>e.text)).join(""):t}_getExpansion(e){const t=this.macros.get(e);if(null==t)return t;if(1===e.length){const t=this.lexer.catcodes[e];if(null!=t&&13!==t)return}const r="function"==typeof t?t(this):t;if("string"==typeof r){let e=0;if(-1!==r.indexOf("#")){const t=r.replace(/##/g,"");for(;-1!==t.indexOf("#"+(e+1));)++e}const t=new Hr(r,this.settings),n=[];let o=t.lex();for(;"EOF"!==o.text;)n.push(o),o=t.lex();n.reverse();return{tokens:n,numArgs:e}}return r}isDefined(e){return this.macros.has(e)||Object.prototype.hasOwnProperty.call(Pr,e)||Object.prototype.hasOwnProperty.call(I.math,e)||Object.prototype.hasOwnProperty.call(I.text,e)||Object.prototype.hasOwnProperty.call(Xr,e)}isExpandable(e){const t=this.macros.get(e);return null!=t?"string"==typeof t||"function"==typeof t||!t.unexpandable:Object.prototype.hasOwnProperty.call(Pr,e)&&!Pr[e].primitive}}const Yr=/^[₊₋₌₍₎₀₁₂₃₄₅₆₇₈₉ₐₑₕᵢⱼₖₗₘₙₒₚᵣₛₜᵤᵥₓᵦᵧᵨᵩᵪ]/,Jr=Object.freeze({"₊":"+","₋":"-","₌":"=","₍":"(","₎":")","₀":"0","₁":"1","₂":"2","₃":"3","₄":"4","₅":"5","₆":"6","₇":"7","₈":"8","₉":"9",ₐ:"a",ₑ:"e",ₕ:"h",ᵢ:"i",ⱼ:"j",ₖ:"k",ₗ:"l",ₘ:"m",ₙ:"n",ₒ:"o",ₚ:"p",ᵣ:"r",ₛ:"s",ₜ:"t",ᵤ:"u",ᵥ:"v",ₓ:"x",ᵦ:"β",ᵧ:"γ",ᵨ:"ρ",ᵩ:"ϕ",ᵪ:"χ","⁺":"+","⁻":"-","⁼":"=","⁽":"(","⁾":")","⁰":"0","¹":"1","²":"2","³":"3","⁴":"4","⁵":"5","⁶":"6","⁷":"7","⁸":"8","⁹":"9",ᴬ:"A",ᴮ:"B",ᴰ:"D",ᴱ:"E",ᴳ:"G",ᴴ:"H",ᴵ:"I",ᴶ:"J",ᴷ:"K",ᴸ:"L",ᴹ:"M",ᴺ:"N",ᴼ:"O",ᴾ:"P",ᴿ:"R",ᵀ:"T",ᵁ:"U",ⱽ:"V",ᵂ:"W",ᵃ:"a",ᵇ:"b",ᶜ:"c",ᵈ:"d",ᵉ:"e",ᶠ:"f",ᵍ:"g",ʰ:"h",ⁱ:"i",ʲ:"j",ᵏ:"k",ˡ:"l",ᵐ:"m",ⁿ:"n",ᵒ:"o",ᵖ:"p",ʳ:"r",ˢ:"s",ᵗ:"t",ᵘ:"u",ᵛ:"v",ʷ:"w",ˣ:"x",ʸ:"y",ᶻ:"z",ᵝ:"β",ᵞ:"γ",ᵟ:"δ",ᵠ:"ϕ",ᵡ:"χ",ᶿ:"θ"}),Qr=Object.freeze({𝒜:"A",ℬ:"B",𝒞:"C",𝒟:"D",ℰ:"E",ℱ:"F",𝒢:"G",ℋ:"H",ℐ:"I",𝒥:"J",𝒦:"K",ℒ:"L",ℳ:"M",𝒩:"N",𝒪:"O",𝒫:"P",𝒬:"Q",ℛ:"R",𝒮:"S",𝒯:"T",𝒰:"U",𝒱:"V",𝒲:"W",𝒳:"X",𝒴:"Y",𝒵:"Z"});var en={"́":{text:"\\'",math:"\\acute"},"̀":{text:"\\`",math:"\\grave"},"̈":{text:'\\"',math:"\\ddot"},"̃":{text:"\\~",math:"\\tilde"},"̄":{text:"\\=",math:"\\bar"},"̆":{text:"\\u",math:"\\breve"},"̌":{text:"\\v",math:"\\check"},"̂":{text:"\\^",math:"\\hat"},"̇":{text:"\\.",math:"\\dot"},"̊":{text:"\\r",math:"\\mathring"},"̋":{text:"\\H"},"̧":{text:"\\c"}},tn={á:"á",à:"à",ä:"ä",ǟ:"ǟ",ã:"ã",ā:"ā",ă:"ă",ắ:"ắ",ằ:"ằ",ẵ:"ẵ",ǎ:"ǎ",â:"â",ấ:"ấ",ầ:"ầ",ẫ:"ẫ",ȧ:"ȧ",ǡ:"ǡ",å:"å",ǻ:"ǻ",ḃ:"ḃ",ć:"ć",č:"č",ĉ:"ĉ",ċ:"ċ",ď:"ď",ḋ:"ḋ",é:"é",è:"è",ë:"ë",ẽ:"ẽ",ē:"ē",ḗ:"ḗ",ḕ:"ḕ",ĕ:"ĕ",ě:"ě",ê:"ê",ế:"ế",ề:"ề",ễ:"ễ",ė:"ė",ḟ:"ḟ",ǵ:"ǵ",ḡ:"ḡ",ğ:"ğ",ǧ:"ǧ",ĝ:"ĝ",ġ:"ġ",ḧ:"ḧ",ȟ:"ȟ",ĥ:"ĥ",ḣ:"ḣ",í:"í",ì:"ì",ï:"ï",ḯ:"ḯ",ĩ:"ĩ",ī:"ī",ĭ:"ĭ",ǐ:"ǐ",î:"î",ǰ:"ǰ",ĵ:"ĵ",ḱ:"ḱ",ǩ:"ǩ",ĺ:"ĺ",ľ:"ľ",ḿ:"ḿ",ṁ:"ṁ",ń:"ń",ǹ:"ǹ",ñ:"ñ",ň:"ň",ṅ:"ṅ",ó:"ó",ò:"ò",ö:"ö",ȫ:"ȫ",õ:"õ",ṍ:"ṍ",ṏ:"ṏ",ȭ:"ȭ",ō:"ō",ṓ:"ṓ",ṑ:"ṑ",ŏ:"ŏ",ǒ:"ǒ",ô:"ô",ố:"ố",ồ:"ồ",ỗ:"ỗ",ȯ:"ȯ",ȱ:"ȱ",ő:"ő",ṕ:"ṕ",ṗ:"ṗ",ŕ:"ŕ",ř:"ř",ṙ:"ṙ",ś:"ś",ṥ:"ṥ",š:"š",ṧ:"ṧ",ŝ:"ŝ",ṡ:"ṡ",ẗ:"ẗ",ť:"ť",ṫ:"ṫ",ú:"ú",ù:"ù",ü:"ü",ǘ:"ǘ",ǜ:"ǜ",ǖ:"ǖ",ǚ:"ǚ",ũ:"ũ",ṹ:"ṹ",ū:"ū",ṻ:"ṻ",ŭ:"ŭ",ǔ:"ǔ",û:"û",ů:"ů",ű:"ű",ṽ:"ṽ",ẃ:"ẃ",ẁ:"ẁ",ẅ:"ẅ",ŵ:"ŵ",ẇ:"ẇ",ẘ:"ẘ",ẍ:"ẍ",ẋ:"ẋ",ý:"ý",ỳ:"ỳ",ÿ:"ÿ",ỹ:"ỹ",ȳ:"ȳ",ŷ:"ŷ",ẏ:"ẏ",ẙ:"ẙ",ź:"ź",ž:"ž",ẑ:"ẑ",ż:"ż",Á:"Á",À:"À",Ä:"Ä",Ǟ:"Ǟ",Ã:"Ã",Ā:"Ā",Ă:"Ă",Ắ:"Ắ",Ằ:"Ằ",Ẵ:"Ẵ",Ǎ:"Ǎ",Â:"Â",Ấ:"Ấ",Ầ:"Ầ",Ẫ:"Ẫ",Ȧ:"Ȧ",Ǡ:"Ǡ",Å:"Å",Ǻ:"Ǻ",Ḃ:"Ḃ",Ć:"Ć",Č:"Č",Ĉ:"Ĉ",Ċ:"Ċ",Ď:"Ď",Ḋ:"Ḋ",É:"É",È:"È",Ë:"Ë",Ẽ:"Ẽ",Ē:"Ē",Ḗ:"Ḗ",Ḕ:"Ḕ",Ĕ:"Ĕ",Ě:"Ě",Ê:"Ê",Ế:"Ế",Ề:"Ề",Ễ:"Ễ",Ė:"Ė",Ḟ:"Ḟ",Ǵ:"Ǵ",Ḡ:"Ḡ",Ğ:"Ğ",Ǧ:"Ǧ",Ĝ:"Ĝ",Ġ:"Ġ",Ḧ:"Ḧ",Ȟ:"Ȟ",Ĥ:"Ĥ",Ḣ:"Ḣ",Í:"Í",Ì:"Ì",Ï:"Ï",Ḯ:"Ḯ",Ĩ:"Ĩ",Ī:"Ī",Ĭ:"Ĭ",Ǐ:"Ǐ",Î:"Î",İ:"İ",Ĵ:"Ĵ",Ḱ:"Ḱ",Ǩ:"Ǩ",Ĺ:"Ĺ",Ľ:"Ľ",Ḿ:"Ḿ",Ṁ:"Ṁ",Ń:"Ń",Ǹ:"Ǹ",Ñ:"Ñ",Ň:"Ň",Ṅ:"Ṅ",Ó:"Ó",Ò:"Ò",Ö:"Ö",Ȫ:"Ȫ",Õ:"Õ",Ṍ:"Ṍ",Ṏ:"Ṏ",Ȭ:"Ȭ",Ō:"Ō",Ṓ:"Ṓ",Ṑ:"Ṑ",Ŏ:"Ŏ",Ǒ:"Ǒ",Ô:"Ô",Ố:"Ố",Ồ:"Ồ",Ỗ:"Ỗ",Ȯ:"Ȯ",Ȱ:"Ȱ",Ő:"Ő",Ṕ:"Ṕ",Ṗ:"Ṗ",Ŕ:"Ŕ",Ř:"Ř",Ṙ:"Ṙ",Ś:"Ś",Ṥ:"Ṥ",Š:"Š",Ṧ:"Ṧ",Ŝ:"Ŝ",Ṡ:"Ṡ",Ť:"Ť",Ṫ:"Ṫ",Ú:"Ú",Ù:"Ù",Ü:"Ü",Ǘ:"Ǘ",Ǜ:"Ǜ",Ǖ:"Ǖ",Ǚ:"Ǚ",Ũ:"Ũ",Ṹ:"Ṹ",Ū:"Ū",Ṻ:"Ṻ",Ŭ:"Ŭ",Ǔ:"Ǔ",Û:"Û",Ů:"Ů",Ű:"Ű",Ṽ:"Ṽ",Ẃ:"Ẃ",Ẁ:"Ẁ",Ẅ:"Ẅ",Ŵ:"Ŵ",Ẇ:"Ẇ",Ẍ:"Ẍ",Ẋ:"Ẋ",Ý:"Ý",Ỳ:"Ỳ",Ÿ:"Ÿ",Ỹ:"Ỹ",Ȳ:"Ȳ",Ŷ:"Ŷ",Ẏ:"Ẏ",Ź:"Ź",Ž:"Ž",Ẑ:"Ẑ",Ż:"Ż",ά:"ά",ὰ:"ὰ",ᾱ:"ᾱ",ᾰ:"ᾰ",έ:"έ",ὲ:"ὲ",ή:"ή",ὴ:"ὴ",ί:"ί",ὶ:"ὶ",ϊ:"ϊ",ΐ:"ΐ",ῒ:"ῒ",ῑ:"ῑ",ῐ:"ῐ",ό:"ό",ὸ:"ὸ",ύ:"ύ",ὺ:"ὺ",ϋ:"ϋ",ΰ:"ΰ",ῢ:"ῢ",ῡ:"ῡ",ῠ:"ῠ",ώ:"ώ",ὼ:"ὼ",Ύ:"Ύ",Ὺ:"Ὺ",Ϋ:"Ϋ",Ῡ:"Ῡ",Ῠ:"Ῠ",Ώ:"Ώ",Ὼ:"Ὼ"};const rn=["bin","op","open","punct","rel"],nn=/([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/;class on{constructor(e,t,r=!1){this.mode="math",this.gullet=new Kr(e,t,this.mode),this.settings=t,this.isPreamble=r,this.leftrightDepth=0,this.prevAtomType=""}expect(e,t=!0){if(this.fetch().text!==e)throw new r(`Expected '${e}', got '${this.fetch().text}'`,this.fetch());t&&this.consume()}consume(){this.nextToken=null}fetch(){return null==this.nextToken&&(this.nextToken=this.gullet.expandNextToken()),this.nextToken}switchMode(e){this.mode=e,this.gullet.switchMode(e)}parse(){this.gullet.beginGroup(),this.settings.colorIsTextColor&&this.gullet.macros.set("\\color","\\textcolor");const e=this.parseExpression(!1);if(this.expect("EOF"),this.isPreamble){const e=Object.create(null);return Object.entries(this.gullet.macros.current).forEach((([t,r])=>{e[t]=r})),this.gullet.endGroup(),e}const t=this.gullet.macros.get("\\df@tag");return this.gullet.endGroup(),t&&(this.gullet.macros.current["\\df@tag"]=t),e}static get endOfExpression(){return["}","\\endgroup","\\end","\\right","\\endtoggle","&"]}subparse(e){const t=this.nextToken;this.consume(),this.gullet.pushToken(new mt("}")),this.gullet.pushTokens(e);const r=this.parseExpression(!1);return this.expect("}"),this.nextToken=t,r}parseExpression(e,t,r){const n=[];for(this.prevAtomType="";;){"math"===this.mode&&this.consumeSpaces();const o=this.fetch();if(-1!==on.endOfExpression.indexOf(o.text))break;if(t&&o.text===t)break;if(r&&"\\middle"===o.text)break;if(e&&Pr[o.text]&&Pr[o.text].infix)break;const a=this.parseAtom(t);if(!a)break;"internal"!==a.type&&(n.push(a),this.prevAtomType="atom"===a.type?a.family:a.type)}return"text"===this.mode&&this.formLigatures(n),this.handleInfixNodes(n)}handleInfixNodes(e){let t,n=-1;for(let o=0;o<e.length;o++)if("infix"===e[o].type){if(-1!==n)throw new r("only one infix operator per group",e[o].token);n=o,t=e[o].replaceWith}if(-1!==n&&t){let r,o;const a=e.slice(0,n),s=e.slice(n+1);let i;return r=1===a.length&&"ordgroup"===a[0].type?a[0]:{type:"ordgroup",mode:this.mode,body:a},o=1===s.length&&"ordgroup"===s[0].type?s[0]:{type:"ordgroup",mode:this.mode,body:s},i="\\\\abovefrac"===t?this.callFunction(t,[r,e[n],o],[]):this.callFunction(t,[r,o],[]),[i]}return e}handleSupSubscript(e){const t=this.fetch(),n=t.text;this.consume(),this.consumeSpaces();const o=this.parseGroup(e);if(!o)throw new r("Expected group after '"+n+"'",t);return o}formatUnsupportedCmd(e){const t=[];for(let r=0;r<e.length;r++)t.push({type:"textord",mode:"text",text:e[r]});const r={type:"text",mode:this.mode,body:t};return{type:"color",mode:this.mode,color:this.settings.errorColor,body:[r]}}parseAtom(e){const t=this.parseGroup("atom",e);if("text"===this.mode)return t;let n,o;for(;;){this.consumeSpaces();const e=this.fetch();if("\\limits"===e.text||"\\nolimits"===e.text){if(t&&"op"===t.type){const r="\\limits"===e.text;t.limits=r,t.alwaysHandleSupSub=!0}else{if(!t||"operatorname"!==t.type)throw new r("Limit controls must follow a math operator",e);t.alwaysHandleSupSub&&(t.limits="\\limits"===e.text)}this.consume()}else if("^"===e.text){if(n)throw new r("Double superscript",e);n=this.handleSupSubscript("superscript")}else if("_"===e.text){if(o)throw new r("Double subscript",e);o=this.handleSupSubscript("subscript")}else if("'"===e.text){if(n)throw new r("Double superscript",e);const t={type:"textord",mode:this.mode,text:"\\prime"},o=[t];for(this.consume();"'"===this.fetch().text;)o.push(t),this.consume();"^"===this.fetch().text&&o.push(this.handleSupSubscript("superscript")),n={type:"ordgroup",mode:this.mode,body:o}}else{if(!Jr[e.text])break;{const t=Yr.test(e.text),r=[];for(r.push(new mt(Jr[e.text])),this.consume();;){const e=this.fetch().text;if(!Jr[e])break;if(Yr.test(e)!==t)break;r.unshift(new mt(Jr[e])),this.consume()}const a=this.subparse(r);t?o={type:"ordgroup",mode:"math",body:a}:n={type:"ordgroup",mode:"math",body:a}}}}if(n||o){if(t&&"multiscript"===t.type&&!t.postscripts)return t.postscripts={sup:n,sub:o},t;{const e=!t||"op"!==t.type&&"operatorname"!==t.type?void 0:nt(this.nextToken.text);return{type:"supsub",mode:this.mode,base:t,sup:n,sub:o,isFollowedByDelimiter:e}}}return t}parseFunction(e,t){const n=this.fetch(),o=n.text,a=Pr[o];if(!a)return null;if(this.consume(),t&&"atom"!==t&&!a.allowedInArgument)throw new r("Got function '"+o+"' with no arguments"+(t?" as "+t:""),n);if("text"===this.mode&&!a.allowedInText)throw new r("Can't use function '"+o+"' in text mode",n);if("math"===this.mode&&!1===a.allowedInMath)throw new r("Can't use function '"+o+"' in math mode",n);const s=this.prevAtomType,{args:i,optArgs:l}=this.parseArguments(o,a);return this.prevAtomType=s,this.callFunction(o,i,l,n,e)}callFunction(e,t,n,o,a){const s={funcName:e,parser:this,token:o,breakOnTokenText:a},i=Pr[e];if(i&&i.handler)return i.handler(s,t,n);throw new r(`No function handler for ${e}`)}parseArguments(e,t){const n=t.numArgs+t.numOptionalArgs;if(0===n)return{args:[],optArgs:[]};const o=[],a=[];for(let s=0;s<n;s++){let n=t.argTypes&&t.argTypes[s];const i=s<t.numOptionalArgs;(t.primitive&&null==n||"sqrt"===t.type&&1===s&&null==a[0])&&(n="primitive");const l=this.parseGroupOfType(`argument to '${e}'`,n,i);if(i)a.push(l);else{if(null==l)throw new r("Null argument, please report this as a bug");o.push(l)}}return{args:o,optArgs:a}}parseGroupOfType(e,t,n){switch(t){case"size":return this.parseSizeGroup(n);case"url":return this.parseUrlGroup(n);case"math":case"text":return this.parseArgumentGroup(n,t);case"hbox":{const e=this.parseArgumentGroup(n,"text");return null!=e?{type:"styling",mode:e.mode,body:[e],scriptLevel:"text"}:null}case"raw":{const e=this.parseStringGroup("raw",n);return null!=e?{type:"raw",mode:"text",string:e.text}:null}case"primitive":{if(n)throw new r("A primitive argument cannot be optional");const t=this.parseGroup(e);if(null==t)throw new r("Expected group as "+e,this.fetch());return t}case"original":case null:case void 0:return this.parseArgumentGroup(n);default:throw new r("Unknown group type as "+e,this.fetch())}}consumeSpaces(){for(;;){const e=this.fetch().text;if(" "!==e&&" "!==e&&"︎"!==e)break;this.consume()}}parseStringGroup(e,t){const r=this.gullet.scanArgument(t);if(null==r)return null;let n,o="";for(;"EOF"!==(n=this.fetch()).text;)o+=n.text,this.consume();return this.consume(),r.text=o,r}parseRegexGroup(e,t){const n=this.fetch();let o,a=n,s="";for(;"EOF"!==(o=this.fetch()).text&&e.test(s+o.text);)a=o,s+=a.text,this.consume();if(""===s)throw new r("Invalid "+t+": '"+n.text+"'",n);return n.range(a,s)}parseSizeGroup(e){let t,n=!1;if(this.gullet.consumeSpaces(),t=e||"{"===this.gullet.future().text?this.parseStringGroup("size",e):this.parseRegexGroup(/^[-+]? *(?:$|\d+|\d+\.\d*|\.\d*) *[a-z]{0,2} *$/,"size"),!t)return null;e||0!==t.text.length||(t.text="0pt",n=!0);const o=nn.exec(t.text);if(!o)throw new r("Invalid size: '"+t.text+"'",t);const a={number:+(o[1]+o[2]),unit:o[3]};if(!Te(a))throw new r("Invalid unit: '"+a.unit+"'",t);return{type:"size",mode:this.mode,value:a,isBlank:n}}parseUrlGroup(e){this.gullet.lexer.setCatcode("%",13),this.gullet.lexer.setCatcode("~",12);const t=this.parseStringGroup("url",e);if(this.gullet.lexer.setCatcode("%",14),this.gullet.lexer.setCatcode("~",13),null==t)return null;let r=t.text.replace(/\\([#$%&~_^{}])/g,"$1");return r=t.text.replace(/{\u2044}/g,"/"),{type:"url",mode:this.mode,url:r}}parseArgumentGroup(e,t){const r=this.gullet.scanArgument(e);if(null==r)return null;const n=this.mode;t&&this.switchMode(t),this.gullet.beginGroup();const o=this.parseExpression(!1,"EOF");this.expect("EOF"),this.gullet.endGroup();const a={type:"ordgroup",mode:this.mode,loc:r.loc,body:o};return t&&this.switchMode(n),a}parseGroup(e,t){const r=this.fetch(),n=r.text;let o;if("{"===n||"\\begingroup"===n||"\\toggle"===n){this.consume();const 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