Question

evaluate the integral: (8x^4 + 5)^3 (32x^3) dx

Answer 1

do substituion:
u=8x^4 +5
du=32x^3
can you finish it?

Answer 2

\[=\int\limits_{ }^{}u ^{3}du= u ^{4}/4 +const=(8x ^{4}+5)^{4}/4 +const\]