Answer:
a = -
b = -
c = 9
d = 3
e = 3
f = 2
Explanation:
First we will solve the expression:

Solving:
First we will take negative sign common, then take LCM of denominator and simplify the expression.

So, After solving we get:
a = -
b = -
c = 9
d = 3
e = 3
f = 2