$\lim_{x\to2}\left(\frac{\sin\left(x-1\right)}{x^2-3x+2}\right)$
$x^2+28x+64$
$2\left(2n-6\right)$
$\int\frac{5x+6}{\left(x-1\right)\left(x+4\right)}dx$
$\lim_{x\to0}\left(\frac{x^2\ln\left(x\right)}{2}\right)$
$\sin^2\left(x-40\right)=0.75$
$u^2-2u-1$
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