200
2x(7-4x+9)
14x-8x2+18x
200
7x(3+5x-2)
21x+35x2-14x
200
2y(3-6x-4y)
6y-6x-8y2
300
3y(8x-7+9y)
24yx-21y+27y2
300
3n(12-22n+9)
36n-66n2+27n
300
7(6a-8b-4-3)
42a-56b-7
300
5y(6n+8y+4)
30yn+40y2+20y
400
-6n(5n-[-7]+8
-30n2+42n-48
400
9b(3-[-6b]+4)
29b+54b2+36b
400
-3(7x-[-9]+12x)
-21x+27+[-36x]
400
45y(-34x+34y-66x)
79y-100x
400
12(-5+8x+9x)
-60+204x