Rational Number Operations

Very Hard Number And Operations Rational Numbers

Consider the numbers $a = \f\frac{5}{12}$, $b = -\f\frac{3}{4}$, and $c = 1 \f\frac{1}{6}$. Calculate the value of the expression:

$$ E = \f\frac{(a + b)(c - b)}{c} $$