$4\left(-\cos\left(\frac{1}{2}\right)\left(x-2\right)e^{-x}\right)+8\left(-\cos\left(\frac{1}{2}\right)\left(x-2\right)e^{-x}\right)=0$
$6xy-xy+5xy$
$3^{\:6}\:x\:3^{\:4}$
$3x\:+7y\:=5\:$
$23.99\cdot0.13$
$\lim_{x\to0}\left(\sin\left(\sqrt{x^2}\right)\right)$
$p^2-5p$
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