$\frac{x^3-2^2+x}{x-5}$
$\frac{cos2x-cos8x}{2sin5x}=sin3x$
$\sin\left(x\right)\cos\left(x\right)=\frac{327}{1000}$
$\lim_{y\to0}\left(\frac{2\left(x+y\right)^2-5\left(x+y\right)-2x^2-5x}{y}\right)$
$\left(-40\right)-\left(-37\right)$
$6x-5=2x+7$
$-8m=7-7m$
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