Using uuu-substitution for ∫2x(x2+1)5 dx\int 2x(x^2+1)^5 \, dx∫2x(x2+1)5dx, if u=x2+1u = x^2+1u=x2+1, what is the resulting integral in terms of uuu?
∫u5 du\int u^5 \, du∫u5du
∫2u5 du\int 2u^5 \, du∫2u5du
∫u6 du\int u^6 \, du∫u6du
∫16u6 du\int \frac{1}{6} u^6 \, du∫61u6du