$\int\frac{x^2+1}{x\sqrt{x^2-4}}dx$
$w^2-6w=25$
$6\left(3\right)^2\left(-2^2\right)+3\left(-2^2\right)\left(3\right)$
$4b\left(3b^2-b-3\right)$
$\frac{\sin^2x-\sin x-2}{\sin x-2}$
$-2\left(5\right)^2+8$
$\int\left(\frac{4x}{\left(x^2+1\right)^3}\right)dx$
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