18 and -5
69
71
91
45 and 2.
71
It is not possible to multiply two prime numbers and get 90. You can add 43 and 47.
133
If you've written this down correctly, there aren't two whole numbers that satisfy these conditions. The closest is -98 and 4, which multiply to -392, but add to -94.
103
-117
37 and 53 = 90