$\frac{\cos\left(x\right)-2}{-3-2\cos\left(x\right)}=\frac{1}{3}$
$-13\cdot16$
$\theta-3=1$
$\int\frac{x+1}{\sqrt{4x^2+8x+1}}dx$
$\left(4\cdot2\right)^{\left(5\right)}$
$a+4+a+2a+7$
$\lim_{w\to+\infty}\frac{2w^2-2w-2}{w^2-1}$
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