A)5a+10-6a+7=-a+17
B/-3b²-7b+5b-b²=-4b²-2b
C/-4c-3c²-9+2c-6c²=-2c-9c²-9
d/-5d+5d²-10d-42+18d=3d+5d²-42
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A)5a+10-6a+7=-a+17
B/-3b²-7b+5b-b²=-4b²-2b
C/-4c-3c²-9+2c-6c²=-2c-9c²-9
d/-5d+5d²-10d-42+18d=3d+5d²-42