If $$ {x=a^{2 over3}-a^{-2 over3}}$$ then the value of $$ {x^{3}+3x}$$.

• A. $$ {a^2-{1 over{a^{2}}}}$$
• B. $$ {a^2+{1 over{a^{2}}}}$$
• C. $$ {a+{1 over a}}$$
• D. $$ {a-{1 over a}}$$