var breakapart = function (s) {
s = s.match(/(?:(\((.*)\))|([\*\/+\-^])|(\d*\.?\d+)|(\D))/gi).map(function (e) {
if (/^\((.*)\)$/gi.test(e)) {
e = e.replace(/^\((.*)\)$/gi, '$1');
return breakapart(e);
}
return e;
});
return s;
};
var byequals = function (s) {
s = s.split(/(=)/gi);
return s.map(function(e){if(/\d*[\*\/+\-^]\d+/.test(e)){return breakapart(e);}
return e;
};
console.dir(byequals('x(1.1+-21)*3/4=-5'))
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