$\lim_{x\to0}\left(\frac{2\arctan\left(x\right)-x}{2x-\arcsin\left(x\right)}\right)$
$8-4\left(-x+5\right)=4x+13$
$\left(5y+4\right)+\left(2y-2\right)$
$8+2\left(x+2\right)^2$
$\left(5-2b\right)^3$
$-12\cdot5+4$
$\frac{1-cosx}{secx-1}$
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