Simplify
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(3x²−2x+5)+(x²+4x−7)−1(2x²−5x−2)
(3x²−2x+5)+(x²+4x−7)−2x²+5x+2
Eliminate redundant parentheses
(3x²−2x+5)+(x²+4x−7)−2x²+5x+2
3x²−2x+5+x²+4x−7−2x²+5x+2
Add the numbers
3x²−2x+5+x²+4x−7−2x²+5x+2
3x²−2x+0+x²+4x−2x²+5x
Add zero
3x²−2x+0+x²+4x−2x²+5x
3x²−2x+2+4x−2x²+5x
Combine like terms
3x2−2x+x²+4x−2x²+5x
2x²−2x+4x+5x
2x²+7x
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