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COMPETZ - Makes You Compete
Answer with Explanation:

= x(b - c)(b + c - a) . x(c - a)(c + a - b) . x(a - b)(a + b - c) 
 
= x(b - c)(b + c) - a(b - c) . x(c - a)(c + a) - b(c - a) . x(a - b)  (a + b) - c(a - b)

= x(b2 - c2 + c2 - a2 + a2 - b2) . x-a(b - c) - b(c - a) - c(a - b) 
 
= (x0 x x0) 
 
= (1 x 1) = 1. 
 
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