Missing Parentheses in Complex Number Operations with SymPy

[limka1200]

I noticed a potential issue when using SymPy in combination with handcalcs. When performing operations involving complex numbers, parentheses are not added around terms during subtraction or multiplication. This could lead to confusion, especially when negative parts of complex numbers are involved, as the expressions might appear mathematically incorrect.
Here’s an example to illustrate:

from sympy import I
import handcalcs.render

%%render
z1 = 3 + I*4
z2 = -4 + I*3

z01 = z1*z2
z02 = z1-z2

The rendered output in LaTeX might look like this

Expected Behavior

Parentheses should be automatically placed around subtracted or multiplied terms to clarify the operations:
z01 = (3 + 4i)(-4 + 3i) = -24 - 7i
z02 = 3 + 4i - (-4 + 3i) = 7 + i

Version: 1.9.0