$2r+2+5r-2+r$
$4\left(x+2\right)-3\left(x-5\right)lsd$
$504-18-20$
$1+-1+2+-2$
$\int_0^{\infty}\left(2\sin\left(3\pi t+4\right)e^{-st}\right)dx$
$\left(e^2x+8\right)^2$
$\sqrt[4]{\frac{81}{16}}\:a^8b^{12}c^{16\:}$
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