zad4 5x-(2-6x)= -2ab-(3ab-4b+7)= (3x-2y)-(4x+2y-1)= (-6x+5y-3)-(2x+3y-1)= (8ab-4a+b)-(ab-5a-2b)= (3a²-2a)-(5a-4a²)-(b-2a²+a)=

a) 5x-2+6x=11x-2 b) -2ab-3ab+4b-7=-5ab+4b-7 c) 3x-2y-4x-2y+1= -x-4y+1 d) -6x+5y-3-2x-3y+1= -8x+2y-2 e) 8ab-4a+b-ab+5a+2b=7ab+a+3b f) [latex] 3a^{2} -2a-5a+ 4a^{2} -b+ 2a^{2} - a^{2} = 8 a^{2} -7a-b[/latex]