सरल कीजिए ।
(i) `(2x+p-c)^(2)-(2x-p+c)^(2)`
(ii) `(x^(2)+y^(2)-z^(2))^(2)-(x^(2)-y^(2)+z^(2))^(2)`
(iii) `(a+b+c)^(2)+(a-b-c)^(2)+(a+b-c)^(2)`

Explanation

(i) `8x(p-c)`
(ii) `4x^(2)(y^(2)-z^(2))`
(iii) `3(a^(2)+b^(2)+c^(2))+2ab-2bc+2ca`