Question

h+7 8h+56
---- div --------
h-7 h-3 divide and simplify

Answer 1

it's the same as writing
h+7 h-3
---- x ------
h-7 8h+56

(dividing fractions is the same as multiplying by the reciprocal)

then you factor the denominator of the second fraction to get

h+7 h-3
---- x ------
h-7 8(h+7)

the h+7 terms cancel and you're left with

h-3
---
h-7