Find the most general antiderivative of the function. Use C. f(x) = 2/3 +(3/4)x^(2) − (4/5)x^(3).

Find the most general antiderivative of the function. (Check your answer by differentiation. Use C for the constant of the antiderivative.)
f(x) =
2
3
+
3
4
x2 −
4
5
x .