Consider the given integral.
I=∫⎡⎢⎣x13⎛⎜⎝1+x13⎞⎟⎠−2⎤⎥⎦dx
I=∫⎛⎜⎝x13+x23−2⎞⎟⎠dx
I=x4343+x5353−2x+C
I=34x43+35x53−2x+C
Hence, this is the answer.