$\sin\left(\frac{1}{4}\right)x=0$
$\lim_{x\to3}\left(2\right)^{x-1}$
$\int_0^1\left(e^{-ax}\right)\left(x\right)dx$
$( x ^ { 4 } - 2 x ^ { 3 } - x$
$\lim_{x\to\infty}\left(\frac{-x-e^{15x}}{2x^2-2x-18}\right)$
$\tan\left(\arccos\left(x\right)\right)$
$\left|-7\right|\cdot\left|-4\right|\cdot\left|-2\right|$
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