x(x) should be interpreted as x*(x)

[jondo]

Instead, it is interpreted as a function x evaluated at point x, which breaks the rule of least surprise (edit: at least for mathematicians, which are certainly one target group).
See https://gamma.sympy.org/input/?i=x%28x%29.
This would have saved me some debugging today.
Wolfram Alpha also does this.

At least there should be a warning about a reused name.

[MateusVDT]

This one works exactly as intended, you can't use implicit multiplications on Python, unless python sintax changes this is probably going to remain the way it is

[jondo]

Shouldn't Sympy Gamma accept more than strict Python syntax? Why else offer the comparison to Wolfram Alpha? Also, Sympy Gamma's Github repo description is 'A SymPy version of WolframAlpha.'.