Function exprToString

test/utils.ts:102–106

(expr: ExpressionInput | null | undefined)

  if (typeof expr === 'number') return expr.toString();
  if (!expr) return '';
  return exprToStringRecursive(expr, 0);
}

// export function parse(latex: string): string {
//   return exprToString(engine.parse(latex));
// }

export function evaluate(latex: string): string {