$y'\:=\frac{-x}{y-2x}$
$\lim_{x\to0}\left(\frac{4}{\sin\left(3x\right)}\right)$
$\left(x^3-\frac{1}{4}x^{-3}\right)^2$
$3.65+1.36+0.85+2.18$
$4y+7y+3y$
$\left(x^m-5\right)\left(x^m+5\right)$
$\int\frac{1}{\sqrt{\left(x+1\right)^2+25}}dx$
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