Question

-a4-b4 divided by a-b

Answer 1

7+8
=7×(8+6)
=7×14
=98
This is because
 It has been mentioned that
2+3=8
 Implies
2×(3+1)=8;
It is given that:
3+7=27
implies,
3×(7+2)=27
.
.
.
.
So on 
Therefore
7+8=98