[tex]Calculati: \\ \\ a^{ \frac{3}{4} }*(a^{ \frac{1}{3}}*a^{- \frac{2}{3}})^{6}:(a^{ \frac{2}{3} })^{ \frac{1}{4} } =? \\ \\ \\ Raspunsul~trebuie~sa~fie~- \frac{17}{12} \\ [/tex]