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r=t.GetBrackets(e),n=t.GetArgument(e);"\\frac"===n&&(n+="{"+t.GetArgument(n)+"}{"+t.GetArgument(n)+"}");var a=new u.default(n,t.stack.env,t.configuration).mml();a=r?t.create("node","mroot",[a,o(t,r)]):t.create("node","msqrt",[a]),t.Push(a)},a.Root=function(t,e){var r=t.GetUpTo(e,"\\of"),n=t.ParseArg(e),a=t.create("node","mroot",[n,o(t,r)]);t.Push(a)},a.MoveRoot=function(t,e,r){if(!t.stack.env.inRoot)throw new d.default("MisplacedMoveRoot","%1 can appear only within a root",t.currentCS);if(t.stack.global[r])throw new d.default("MultipleMoveRoot","Multiple use of %1",t.currentCS);var n=t.GetArgument(e);if(!n.match(/-?[0-9]+/))throw new d.default("IntegerArg","The argument to %1 must be an integer",t.currentCS);"-"!==(n=parseInt(n,10)/15+"em").substr(0,1)&&(n="+"+n),t.stack.global[r]=n},a.Accent=function(t,e,r,n){var a=t.ParseArg(e),i=y.default.getFontDef(t);i.accent=!0;var o=p.default.createEntity(r),s=t.create("token","mo",i,o);p.default.setAttribute(s,"stretchy",!!n);var 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r=t.create("node","mrow"),n=t.create("node","mpadded",[r],{height:"8.6pt",depth:"3pt",width:0});t.Push(n)},a.Phantom=function(t,e,r,n){var a=t.create("node","mphantom",[t.ParseArg(e)]);(r||n)&&(a=t.create("node","mpadded",[a]),n&&(p.default.setAttribute(a,"height",0),p.default.setAttribute(a,"depth",0)),r&&p.default.setAttribute(a,"width",0));var i=t.create("node","TeXAtom",[a]);t.Push(i)},a.Smash=function(t,e){var r=y.default.trimSpaces(t.GetBrackets(e,"")),n=t.create("node","mpadded",[t.ParseArg(e)]);switch(r){case"b":p.default.setAttribute(n,"depth",0);break;case"t":p.default.setAttribute(n,"height",0);break;default:p.default.setAttribute(n,"height",0),p.default.setAttribute(n,"depth",0)}var a=t.create("node","TeXAtom",[n]);t.Push(a)},a.Lap=function(t,e){var r=t.create("node","mpadded",[t.ParseArg(e)],{width:0});"\\llap"===e&&p.default.setAttribute(r,"lspace","-1width");var n=t.create("node","TeXAtom",[r]);t.Push(n)},a.RaiseLower=function(t,e){var r=t.GetDimen(e),n=t.itemFactory.create("position").setProperties({name:t.currentCS,move:"vertical"});"-"===r.charAt(0)&&(r=r.slice(1),e="raise"===e.substr(1)?"\\lower":"\\raise"),"\\lower"===e?(n.setProperty("dh","-"+r),n.setProperty("dd","+"+r)):(n.setProperty("dh","+"+r),n.setProperty("dd","-"+r)),t.Push(n)},a.MoveLeftRight=function(t,e){var r=t.GetDimen(e),n="-"===r.charAt(0)?r.slice(1):"-"+r;if("\\moveleft"===e){var a=r;r=n,n=a}t.Push(t.itemFactory.create("position").setProperties({name:t.currentCS,move:"horizontal",left:t.create("node","mspace",[],{width:r}),right:t.create("node","mspace",[],{width:n})}))},a.Hskip=function(t,e){var r=t.create("node","mspace",[],{width:t.GetDimen(e)});t.Push(r)},a.Rule=function(t,e,r){var n={width:t.GetDimen(e),height:t.GetDimen(e),depth:t.GetDimen(e)};"blank"!==r&&(n.mathbackground=t.stack.env.color||"black");var a=t.create("node","mspace",[],n);t.Push(a)},a.rule=function(t,e){var r=t.GetBrackets(e),n=t.GetDimen(e),a=t.GetDimen(e),i=t.create("node","mspace",[],{width:n,height:a,mathbackground:t.stack.env.color||"black"});r&&(i=t.create("node","mpadded",[i],{voffset:r}),r.match(/^\-/)?(p.default.setAttribute(i,"height",r),p.default.setAttribute(i,"depth","+"+r.substr(1))):p.default.setAttribute(i,"height","+"+r)),t.Push(i)},a.MakeBig=function(t,e,r,n){var a=String(n*=1.2/.85).replace(/(\.\d\d\d).+/,"$1")+"em",i=t.GetDelimiter(e,!0),o=t.create("token","mo",{minsize:a,maxsize:a,fence:!0,stretchy:!0,symmetric:!0},i),s=t.create("node","TeXAtom",[o],{texClass:r});t.Push(s)},a.BuildRel=function(t,e){var r=t.ParseUpTo(e,"\\over"),n=t.ParseArg(e),a=t.create("node","munderover");p.default.setChild(a,0,n),p.default.setChild(a,1,null),p.default.setChild(a,2,r);var i=t.create("node","TeXAtom",[a],{texClass:g.TEXCLASS.REL});t.Push(i)},a.HBox=function(t,e,r){t.PushAll(y.default.internalMath(t,t.GetArgument(e),r))},a.FBox=function(t,e){var 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p=t.itemFactory.create("array").setProperty("requireClose",!0);p.arraydef={rowspacing:o||"4pt",columnspacing:i||"1em"},l&&p.setProperty("isCases",!0),u&&(p.setProperty("isNumbered",!0),p.arraydef.side=u),(r||n)&&(p.setProperty("open",r),p.setProperty("close",n)),"D"===s&&(p.arraydef.displaystyle=!0),null!=a&&(p.arraydef.columnalign=a),t.Push(p)},a.Entry=function(t,e){if(t.Push(t.itemFactory.create("cell").setProperties({isEntry:!0,name:e})),t.stack.Top().getProperty("isCases")){for(var r=t.string,n=0,a=-1,i=t.i,o=r.length;i<o;){var s=r.charAt(i);if("{"===s)n++,i++;else if("}"===s)0===n?o=0:(0===--n&&a<0&&(a=i-t.i),i++);else{if("&"===s&&0===n)throw new d.default("ExtraAlignTab","Extra alignment tab in \\cases text");"\\"===s?r.substr(i).match(/^((\\cr)[^a-zA-Z]|\\\\)/)?o=0:i+=2:i++}}var l=r.substr(t.i,i-t.i);if(!l.match(/^\s*\\text[^a-zA-Z]/)||a!==l.replace(/\s+$/,"").length-1){var 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