Answer:
y = (1/3)x^3 +4x + c . . . . . for some constant c
Explanation:
The anti-derivative of x^n is (x^(n+1))/(n+1). Applying this rule to each of the terms in dy/dx, we get ...
y = (1/3)x^3 + 4x
There may be an added constant as well, conventionally represented by "c".
y = (1/3)x^3 +4x +c