(5a - 3) + (12a - 4)
17a - 7
(7x - 3) - (10x + 2)
-3x - 5
-2x4(6x2 - 12x + 18)
-12x6 + 24x5 -36x4
4x8 + 12x7 - 20x4
-----------------------
2x2
2x6 + 6x5 - 10x2
-5x(3x2 + 8x - 9) - (9x3 - 60x2 + 13x - 22)
-24x3 + 20x2 + 33x + 22
14x2 +4x - 3
(-4x2 + 4x + 4) - (3x2 - 4x - 2)
-7x2 + 8x + 6
(3x - 5)(2x + 8)
6x2 + 14x - 40
66x13y5 - 54x7y8 + 42x9y6
---------------------------------
6x6y3
11x7y2 - 9xy5 + 7x3y3
(-3x + 5x2 + 4) + (-5 + 4x2 +3x)
9x2 - 1
(-3x + 4 + 5x2) - (-9 + 5x2 -12x)
9x + 13
(-7x - 3)(4x2 -5x -9)
-28x3 + 23x2 +78x +27
13x20 - 5x17 - 7x12
-------------------------
1/2x8
26x12 - 10x9 - 14x4