$\frac{1}{2}\cdot\frac{\sin\left(x\right)}{\cos\left(x\right)}$
$\lim_{x\to2}\left(\frac{x^2-+3x-10}{x^2-4}\right)$
$\left(3x+1\right)\cos\left(x\right)$
$q^2-5q+24$
$\cos^2\left(x\right)+4\sin^2\left(x\right)+2\cos\left(x\right)=12$
$\frac{3x^2y^2}{2x^{-1}\cdot4yx^2}$
$ap+bp+aq+bq$
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