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(i) \(5x(2y – 3)\) iii−ii

(ii) \(-2p(5p^2 – 3p + 7)\) iii+iii−ii

(iii)3mn(m3n3−5m2n+7mn2
 iiiii−iiiii+iiiii

(iv) \(x^2(x + y + z)+ y^2(x+ y + z) + z^2(x – y – z)\) ii+ii−ii+iii+iii+iii+iii+iii−iii