Sarthaks Test
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Simplify each of the following expressions:

(i) (x+y+z)(x+y/2+2/3)2 - (x/2+y/3+z/4)2

(ii) (x+y-2z)2 - x2 -y- 3z2 +4xy

(iii) (x2-x+1)- (x2+x+1)2

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Each of the following expressions are-

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