a simple example of: commands.Bot.wait_for

wait.py

bot_msg = await ctx.send("what is 2 + 3?")

def check(message):
    return message.channel == bot_msg.channel

try:
    msg = bot.wait_for("message", check = check, timeout = 60) # timeout is 60 by default
except asyncio.exceptions.TimeoutError:
    # user didnt reply in 60 seconds
else:
    # user DID reply
    if msg.content == "5":
        await ctx.send("yes")
    else:
        await ctx.send("incorrect")