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2x+6y-2x-6x+1
2x i -2x się skróca
6y-6x+1
(2x + 2)*(3y - x) - 3*( 2x + 1 ) = 2x*3y - 2x *x + 2*3y - 2*x - 3*2x -3*1=
= 6xy - 2x² + 6y - 2x - 6x - 3 = 6xy +6y - 2x² - 8x - 3
Prosże o najj ;)