Add safe fallbacks of pow for integer exponents and complex numbers
#69
| Job | Run time |
|---|---|
| 30s | |
| 36s | |
| 1m 17s | |
| 10m 22s | |
| 10m 26s | |
| 38s | |
| 43s | |
| 1m 8s | |
| 1m 10s | |
| 1m 20s | |
| 39s | |
| 44s | |
| 1m 27s | |
| 1m 22s | |
| 1m 12s | |
| 33m 34s |