$\frac{\left(4x^2+12x+12\right)}{\left(x+2\right)}$

$\left(x^2+24+144\right)$

$\sqrt{a^2+2a^2+2\left(a\right)\left(2a\right)\cos\left(60\right)}$

$\int\frac{9+5x}{1+x^2}dx$

$\int\frac{\arctan\left(x^2\right)-x^2}{x^2}dx$

$-1.7\left(x-2\right)=5.1$

$\left(9x^2+8\right)\left(9x^2-8\right)$