Calculus
# Integration Techniques

Evaluate $\displaystyle{\int_0^{3}\frac{12x+6}{x^2+x+1}dx.}$

Evaluate $\displaystyle{\int_0^\frac{\pi}{32}3\tan8xdx.}$

Using the substitution $u=e^{x^2},$ evaluate $\displaystyle{\int_0^{3}12x e^{x^2}dx.}$