x2 - 2x - 5 - (3x2 - 8x + 7 ) - ( 2x2 - 6x + 12), –4x + 7 – 5x + 3 - –4x + 7 – (5x – 3), 8x + 15y - 5x - 3y -2y 5x - 10y- 2x, -2a2 + 8b2 + 2a - 4b - 5a + 3a2 - 3a + 3b - 5a2 - 7b + 8b2,

monomials subtraction

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