the order of operations is PEMDAS. first solve everything in parentheses, then solve all the exponents, then multiply/divide, then add/subtract
1 is 90
2 is 4 3/4
3 is 1/2
4 is 38
5 is 27
6 is 36
7 is 5
8 is 8 2/3
9 is 36
10 is 4
11 is 233
12 is 53
13 is 18
14 is -18
15 is 38
16 is -34
17 is -5
18 is -29
19 is -93
20 is -141
