1. Simplify combining like terms: (1) 21b-32 + 7b - 20b(ii) - Z2 + 13z2 - 5z + 773 - 15z(ii) p-p-9-9-(q-p)(iv) 3a - 2b - ab - (a - b + ab) + 3ab + b - a(v) 5x’y - 5x2 + 3yx – 3y2 + x2 - y2 + 8xy2 – 3y2(vi) (3y2 + 5y - 4) -(8y- y2 - 4)

1. Simplify combining like terms: (1) 21b-32 + 7b - 20b(ii) - Z2 + 1

1.	1. Simplify combining like terms: (1) 21b-32 + 7b - 20b(ii) - Z2 + 13z2 - 5z + 773 - 15z(ii) p-p-9-9-(q-p)(iv) 3a - 2b - ab - (a - b + ab) + 3ab + b - a(v) 5x’y - 5x2 + 3yx – 3y2 + x2 - y2 + 8xy2 – 3y2(vi) (3y2 + 5y - 4) -(8y- y2 - 4)
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