adding
(54a)+(-55a)-(-1)
-a+1
(53b-4)-(35b+78)
18b-82
-3[(34b+66)*(2)]
-204b-396
(81b3+63b+27b2)
9b(9b2+7+3b)
6[(46x+78)-(39x+77)
42x+6
(89b)+(54a)-(67b-15a)+(5a)
74a+22b
[78b-(-23b+42)]-95b
6b-42
3[(17b+6)(3b+2)]
153b2+156b+36
(24b4+72b2+40b6)
8b2(3b2+9+5b4)
factorise (75x-30x2+60)
15(5x-2x2+4)
(84-b)+(78b-23)-(-89b)
166b+61
-[(84-15b)-(65b+23)]
80b-61
5[(5b+10)(7+6b)]
150b2+475b+350
(77b+121b3-22b)
11b(5+11b2)
2/3[-(8x+78x-x)
-50x
-{[(99b)+(87b)]-[(98b)-(32b)]}
-120b
-84b-(63b+85b-32b)
-200b
(44b+38)(5b+7)
220b2+498b+266
(64b+32b-80b)
8b(12)
factorise [4(x+3)+2(3x-2)]
2[5x+4]
-{-[(32b)+(53b)]-[(5b)-(76b)+(71b)]}
85b
749b-[-(b+44b-85+7b)]
801b-85
(47b+21)(20b+32)
940b2+1924b+672
65b+78b-13b
5b(26)
[-(75x+47-50)+4893]/5
-15x+978