6x - 2 + 2x -4 = x | 3y + 1 - 6y +4 = y |
-5w - (-7) + 7w +2 = w | 3k + (-7)m + 5k +2m = k m |
-z + 4y + 2z +3z = z y | -4a - (-7b) + 7a +2b = a b |
-c + (-3d) + 6d +2c = c d | -7h - 4 + 7h +2 = h |
-a -9b a b = +7a -7b | r - 7 s +2r = +9s |
p - (-3r) - 7p +2r = -p r | v - 3u -4v u - 2 = +3v -u |
g + (j) + 7g +2j = +4g -2j | x - 6y - 7x +2y = -x y |
-3y - (x) y = +7x +4y | -w + (y) + 7w +2y = w - y |