@bot.on.message_chat('реши <what>')
@bot.on.message_chat('Реши <what>')
async def math(ans: Message, what):
	try:
		user = await bot.api.users.get(user_ids=ans.from_id)
		firstname = user[0]['first_name']
		await ans (f'{firstname}, ' + 'Ответ: ' + str(eval(what)))
	except:
		user = await bot.api.users.get(user_ids=ans.from_id)
		firstname = user[0]['first_name']
		await ans(f'{firstname}, неверный пример!')