$\left(\frac{10^8}{10^5}\right)^{-1}$
$4+1-2-3+3-1+4-2-1+1+1+5$
$4\sin\left(x+y\right)-\tan\left(x\right)$
$x^2+4x=285$
$\int2xy^2+3x^2dx$
$\frac{s^2t^3}{r}\cdot\frac{sr^3}{t}$
$\lim_{x\to-3}\left(-2x^2\:-\:12x\:-\:19\right)$
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