InvisibleOperator bug

[314systems]

Steps to Reproduce

console.log(simplify(
  "(sin(alpha)**2 + cos(alpha)**2) * (x**2 + 2*x + 1) / (x + 1)"
));

Actual Result

(InvisibleOperator(s, i, n, (InvisibleOperator(a, l, p, h, a))) * Error("missing") * 2 + InvisibleOperator(c, o, s, (InvisibleOperator(a, l, p, h, a))) * Error("missing") * 2) * (x * Error("missing") * 2 + 2x + 1) / (x + 1)

Expected Result

without InvisibleOperator.

Environment

https://mathlive.io/compute-engine/

Is this a regression: did it use to work in a previous version?

I don't know.

Compute Engine version: '0.65.0'

[arnog]

The simplify() function expects a LaTeX string as input:

console.log(simplify(
  "(\\sin(\\alpha)^2 + \\cos(\\alpha)^2) * (x^2 + 2*x + 1) / (x + 1)"
));
// -> x + 1