Pomoże ktoś 2 zadania przykłady d,e,f tylko a ja nie rozumiem (Na jutro)

11. 1.Na początku najlepiej jest ustawić wyrazy podobnie obok siebie. d)4x2-x-x3+5x-3x3+2x3-4x=-x3-3x3+2x3+4x2-x-5x-4x=-2x3+4x2 e)5x2-x2+y2+y-3-y-2y2+5+5x2-x2-3+5-2y2=4x2-2y2+2=4x2+2-2y2 f)4u+2u2-2w-3u-9u2+w-u2=-8u2+1u-1w 12.  d) 10ab+3ab2+5ab-3ab2=15ab e)5ab+2a+4ab2-2a2b+ba-ab=5ab+2a+4ab2-2a2b f)-3x2y+5xy-5x+x2y+3x+2xy=2x2y+7xy-5x

zad.11 d) 4[latex] x^{2} [/latex]-x-[latex]x^{3}[/latex]+5x-3[latex] x^{3} [/latex]+2[latex] x^{3} [/latex]-4x=4[latex] x^{2} [/latex]-2[latex] x^{3} [/latex] e) 5[latex] x^{2} [/latex]-[latex] x^{2} [/latex]+[latex] y^{2} [/latex]+y-3-y-2[latex] y^{2} [/latex]+5=4[latex] x^{2} [/latex]-[latex] y^{2} [/latex]+2 f) 4u+2[latex]u^{2} [/latex]-2w-3u-9[latex] u^{2} [/latex]+w-[latex] u^{2} [/latex]=u-8[latex] u^{2} [/latex]-w zad.12  d) 10ab+3[latex] ab^{2} [/latex]+5ab-3[latex] ab^{2} [/latex]=15ab e) 5ab+2a+4[latex] ab^{2} [/latex]-2[latex] a^{2} b[/latex]+ba-[latex] ab^{2} [/latex]=6ab+2a+3[latex] ab^{2} [/latex]-2[latex] a^{2}b[/latex] f) -3[latex] x^{2}y[/latex]+5xy-5x+[latex] x^{2} y[/latex]+3x+2yx=-2[latex] x^{2}y[/latex]+7xy-2x