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( 4x^2 - 1 ) - ( 3x - 2x^2 )

User Dav
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(4x^2-1)-(3x-2x^2)
4x^2-1-3x+2x^2
4x^2+2x^2-3x-1
6x^2-3x-1

User Abishek Aditya
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