(4w-5) - (9w+2)
What is -5w-7
(6x2+7) + (3x2+1)
What is 9x2+8
(2k2-k+3) - (5k2+3k-7)
What is -3k2-4k+10
(2g4-3g+9) + (-g3+12g)
What is 2g4-g3+9g+9