Выражение: 1) (8x^2-12x++5x-2) 2) (11+2x)+(-x^2+12x-35) 3) (7a^2-3a++2a^3+5) 4) (14xy-2y^2+-5xy+4x^2) 5) (18a^2b+9ab-2ab^2)+(4ab+2ab^2) 6) (3/14x^2y^3-5//12x^2y-4/35x^2y^3)

(8х²-12х+4)-(2х²+5х-2)=8х²-12х+4-2х²-5х+2=6х²-17х+6=0

(11+2х)+(-х²+12х-35)=11+2х-х²+12х-35=-х²+14х-24=х²-14х+35

(7а²-3а+6)-(-8а+2а³+5)=7а²-3а+6+8а-2а³-5=7а²-2а³+5а+1
или вдруг допущена ошибка не 2а³,а 2а²,то
(7а²-3а+6)-(-8а+2а²+5)=7а²-3а+6+8а-2а²-5=5а²+5а+1

(14ху-2у²+13х²)-(-16у²-5ху+4х²)=14ху-2у²+13х²+15у²+5ху-4х²=19ху+13у²+9х²

(18а²b+9ab-2ab²)+(4ab+2ab²)=18a²b+9ab-2ab²+4ab+2ab²=18a²b+13ab

(3/14x²y³-5/8x²y)-(-3/12x²y-4/35x²y³)=3/14x²y³-5/8x²y+3/12x²y+4/35x²y³=3/14x²y³+4/35x²y³-5/8x²y+3/12x²y=105/490x²y³+56/490x²y³-60/96x²y+24/96x²y=161/490x²y³-36/96x²y=23/70x²y³-3/8x²y

1)=8х^2-12x+4-2x^2+5x-2=6x^2-17x+6
2)=11+2x-x^2+12x-35=-x^2+14x-24
3)=7a^2-3a+6+8a-2a^3-5=-2a^3+7a^2+5a=1
4)=14xy-2y+13x^2+16y^2+5xy-4x^2=19xy+9x^2=14y^2
5)Не знаю
6)Не знаю