Question

-9supra4 + 7supra6 + 13supra12​

Answer 1

$\it -\dfrac{^{3)}9}{\ 4}+\dfrac{^{2)}7}{\ 6}+\dfrac{13}{12}=\dfrac{-27+14+13}{12}=\dfrac{27-27}{12}=\dfrac{0}{12}=0$