There is a new pull request by tornaria against master on the void-packages repository

https://github.com/tornaria/void-packages sympy
https://github.com/void-linux/void-packages/pull/33471

python3-sympy: update to 1.9.
- I generally don't use the affected packages but briefly tested this PR

A patch file from https://github.com/void-linux/void-packages/pull/33471.patch is attached