a+a(a-b)+(-a+b)
= a+a²-ab-a+b
= a²-ab+b
a+{[-b²+2a²]-[a²-b²]}
= a+{-b²+2a²-a²+b²
= a-b²+2a²-a²+b²
= a²+a
2x+{-5x-[-2y+(-x+y)]}
= 2x+{-5x-[-2y-x+y]}
= 2x+{-5x+2y+x-y}
= 2x - 5x +2y+x-y
= -2x+y
-[2p-(-3p+5q)+(-q+4p)]
= - [2p+3p-5q-q-4p]
= - 2p-3p+5q+q+4p
= - p+6q
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Verified answer
a+a(a-b)+(-a+b)
= a+a²-ab-a+b
= a²-ab+b
a+{[-b²+2a²]-[a²-b²]}
= a+{-b²+2a²-a²+b²
= a-b²+2a²-a²+b²
= a²+a
2x+{-5x-[-2y+(-x+y)]}
= 2x+{-5x-[-2y-x+y]}
= 2x+{-5x+2y+x-y}
= 2x - 5x +2y+x-y
= -2x+y
-[2p-(-3p+5q)+(-q+4p)]
= - [2p+3p-5q-q-4p]
= - 2p-3p+5q+q+4p
= - p+6q