$4\:x\:\frac{4}{5}$
$x^2+10x=36$
$2\left(4x+1\right)-\left(5x+3\right)$
$\frac{2x^{-2}y^{-2}}{4y^{-5}}$
$x^4+16x^2+15+25$
$4\:+\:x\:-\:3x\:+\:8\:-\:2x$
$\int_{\infty}^{-1}xe^{-x^2}dx$
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