Integration by substitution Questions (4)

Find $\int \frac{9x^2+2}{3x^3+2x+10} dx$

Find $\int \frac{\sin^{-1} x}{\sqrt{1-x^2}} dx$

Find $\int (4x+6)\sqrt{2x^2+6x+5} dx$

Find $\int \frac{\sin(\tan^{-1} x)}{1+x^2} dx$