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Simplify:

(i) (a+b+c)2 + (a-b+c)2

(ii) (a+b+c)2 - (a-b+c)2

(iii) (a+b+c)2 + (a-b+c)2 + (a+b-c)2

(iv) (2x+p-c)2 - (2x-p+c)2

(v) (x2+y2-z2) - (x2-y2+z2)2

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(i) We have--------

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