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b. the second term is three times the product of the square of the first term and the second term

c. the third term is three times the product of the first term and the square of the second term.

hehehe

the 1st term x (cubed), is the cube of the first term

the 2nd term, 3x(squared)y, is3 times the product of Y and the sqaure of X;

the 3rd term, 3xy(squared), is 3 times the product of x and the suqare of y;

the 4th term, y(cubed), is the cube of the last term, y.