Sarthaks Test
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Simplify combining like terms: 

(i) 21b - 32 + 7b - 20b 

(ii) - z+ 13 z2 - 5 x + 7 z3 -15z 

(iii) p - ( p - q ) - q - (q - p)

(iv) 3a - 2b - ab - (a - b + ab ) + 3ab + b - a 

(v) 5 x2y - 5 x2 + 3 yx2 - 3y2 + x2 - y2 + 8 xy2 - 3y

(vi) (3 y2 + 5 y - 4 ) - (8 y - y2 - 4)

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Simplified like terms

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