17 + 21 = 38
17 x 21 = 357
21+21+17=59
4 + 17 = 21
17 plus 21 equals 38
55 + 34 + 31 + 27 + 21 + 21 + 20 + 17 + 15 + 15 = 256
Are you trying to say 17 + 6 + (7-9) ? = 21
-4 + 21 = 17
2,870,795,128,037,760 or approx 2.871*1015
-21
21 Uhm, no, 17 actually...
14/21 + 1/7 = 17/21
16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238
17/21