Answer:
A. 87b-179+957/87
D. 51b-24
Step-by-step explanation:
A. 87(4)-179+957/87
348-179+957/87
348-179+11
169+11
180
B. 33b12
33(4)12
553648128
C. b2+120
(4)2+120
8+120
128
D. 51b-24
51(4)-24
204-24
180
E. 11b+187-2756/13
11(4)+187-2756/13
44+187-2756/13
44+187-212
231-212
19