1.1/2+5+b2.X*X*X*X-3(X+Y)3a.2a times 3a divided by 6a3b.15X divided by 3 divided by the difference between 5X and 33c. 3a times the sum of a and a4a. 2 times p square times 4q times p4b. 5 times t square times u square times t square4c. 6c times X cube divided by X divided by 8. 追加题 陈先生重75公斤，她的妻子比他重3y公斤. 算出这对夫妇的总体重. 75+（75+3y） 第一题刚才理解错了 改过了！
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