subtracting
(-x2+3x)-(5x+2x2)
-1x2-2x
(4y+5)+(-7y-1)
-3y+4
(x-7)(x+7)
x2-49
4x+12
4(x+3)
2x2-3x-2
(x-2)(2x+1)
4x2+8x+2)-(2x+3)
4x2+6x-1
(3x2-4x+8)+(-1x2-2x+3)
2x2-6x+11
(2x+3)2
4x2+12x+9
3x2-9x-3
3(x2-3x-1)
x2-x-26
prime
(x2-4x-1)-(5x2-3x-5)
-4x2-1x+4
(-4x2-x+9)+(x2+3x-1)
-3x2+2x+8
(3x+2)(x-4)
3x2-10x-8
-9x2-21x
-3x(3x+7)
6x2+3x-9
3(x-1)(2x+3)
(5x2+6x+2)-(7x2-7x+5)
-2x2+13x-3
(3x2-8x+7)+(2x2-6x+12)
5x2-14x+19
(5x-1)(2x+1)
10x2+3x-1
15x2y4+20xy3
5xy3(3xy+4)
x2-11x+10
(x-10)(x-1)
(x3-2x2+4x+6)-(-4x+2x2-3)
x3-2x2+6x+9
(4x2-3x+10)+(x2+x-2)
5x2-2x+8
(4x2+x-1)(3x-7)
12x3-25x2-10x+7
9x3+15x2-15x-25
(3x+5)(3x2-5)
5x2+37x+14
(5x+2)(x+7)