20a + 14ac - 10 ab
18b +9bc - 6bd
10 q r +5 q - 3 q s
5m + 10mx - 25mn
2X + 5XY - 10 Y =
3b (6 + 3c - 2d )
x (2 +5z - 10 y)
2a ( 10 + 7c - 5b )
q ( 10r +5 -3 s)
5m ( 1 + 2x - 5n)
