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A = -3xy2 + 4 - 7x2y2 - 6x2y - 5xy B = 8xy - 2xy2 + 10 + 4x3y

A = -3x2 + 5x - 4 B = 4x3 - 5x2 + 2x + 1

A = 9 + 5x3 - 4x2 + x B = 4x2 - 3 - 2x

A = - 3x2 + 2x4 - 8 - x3 + 1/2 x B = -5x4 - 10 + 3x + 7x3

A = 4x3 + 5 B = -2x + x2

A + B = -3x4 + 6x3 - 3x2 + 7/2 x - 18

A + B = 4x3 - 8x2 + 7x - 3

A + B = 4x3 + x2 - 2x + 5

A + B = 5x3 - x + 6

-9xy2 + 14 + 3xy - 2xy2 + 4x3y - 7x2y2