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Guess math nouns and mathematicians' names (urgent! ! ! )
1. You expect me, and I expect you. The answer is "equal" (waiting for each other)

Grandpa is a pioneer. (Type the mathematician's name) The answer is Zu Chongzhi.

Shave your head. Answer: "secant" or "tangent" or "division"

4. apologize humbly. The answer is "sum"

5. Wrist wrestling. The answer is "proportion" (specific intensity)