Hint: apply basic mathematics rules beginning from BODMAS to algebra, and follow solution carefully to arrive at

p = \(\frac{5}{2}\), q = -\(\frac{25}{4}\) and r = -\(\frac{17}{4}\)

NUMERATOR: a\(^{\frac{2}{1}}*{\frac{3}{4}}\)  b\(^{\frac{-3}{1}}*{\frac{3}{4}}\)  c\(^{\frac{1}{1}}*{\frac{3}{4}}\)

 a\(\frac{3}{2}\)  b\(\frac{-9}{4}\)  c\(\frac{3}{4}\)

Using index method for numerator & denominator : a\(^{\frac{3}{2}}-{\frac{-1}{1}}\) b\(^{\frac{-9}{4}}-{\frac{4}{1}}\) c\(^{\frac{3}{4}}-{\frac{5}{1}}\)

: a\(\frac{5}{2}\)  b\(\frac{-25}{4}\)  c\(\frac{-17}{4}\)

Then p+2q will give you \(\frac{5}{2}+2\left(\frac{-25}{4}\right)= -10\)