Answer
79/40
Work Step by Step
We plug in the given values:
$$ = \frac{2}{3}\frac{6}{5} - \frac{3}{5}\frac{-1}{4} + \frac{3}{4}\frac{6}{5} - \frac{1}{2}\frac{-1}{4}$$
We now multiply and create a common denominator:
$$ = \frac{96}{120} + \frac{18}{120} + \frac{108}{120} + \frac{15}{120} \\ = \frac{79}{40}$$
