(1) (a-b+ c)a+ b c) (a + b-c)(2) (2a2 - 3b2 + 4c2) + (b2-a2+ c2 (a2 -b – InterviewSolution

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1.	(1) (a-b+ c)a+ b c) (a + b-c)(2) (2a2 - 3b2 + 4c2) + (b2-a2+ c2 (a2 -b2 +2(3 ) 4y(3y2 + 5y-7) + 2 (ys_4y2 + 5)(4)2x(x-y-z) + 2y (x + y-z) + 2z (x-y+z)
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