case SUB: t.push(new Double(JS.toDouble(left) - JS.toDouble(right))); break;
case MUL: t.push(new Double(JS.toDouble(left) * JS.toDouble(right))); break;
case DIV: t.push(new Double(JS.toDouble(left) / JS.toDouble(right))); break;
case SUB: t.push(new Double(JS.toDouble(left) - JS.toDouble(right))); break;
case MUL: t.push(new Double(JS.toDouble(left) * JS.toDouble(right))); break;
case DIV: t.push(new Double(JS.toDouble(left) / JS.toDouble(right))); break;