Function evaluate

examples/advanced/web_server/math_worker.js:16–19

* Evaluate an expression * @param {string} expr * @return {string} result

(expr)

 * @return {string} result
 */
function evaluate (expr) {
  const ans = math.evaluate(expr)
  return math.format(ans)
}

// create a worker and register public functions
workerpool.worker({