Bot freezing with Sympy (discord.py)

As Lukas Thaler said, sympy is a synchronous library and it's not meant to be used within asynchronous code, you can however use the loop.run_in_executor method to run it in a non-blocking way:

import asyncio
from functools import partial

loop = asyncio.get_event_loop()  # in py 3.10+ use `asyncio.get_running_loop()`

async def run_blocking(func, *args, **kwargs):
    """Run any blocking, synchronous function in a non-blocking way"""
    callback = partial(func, *args, **kwargs)
    return await loop.run_in_executor(None, callback)


# inside the command
result = await run_blocking(sympy.sympify, calc)