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3a+5+12a-7=15a-2
8-4y-y-6=2-5y
2x+5(3x+4)=2x+15x+20=17x+20
8a-(6a-2)=8a-6a+2=2a+2
3(5-4x)+10=15-12x+10=25-12x
3+5y-4(2y+5)=3+5y-8y-20=-17-3y
5(3b+4)-2(6-7b)=15b+20-12+14b=29b+8
8a-7ab=a(8-7b)
4xy-5x=x(4y-5)
6xy-3y=3y(2x-1)
3yz-12x=3(yz-4x)
7st-14st(kwadrat )=7st(1-2t)
2xy-4x2(kwadrat) =2(xy-2x2kwadrat)
8ac-6b=2(4ac-3b)
8xy-16y(kwadrat)=8y(x-2ykwadrat)