$1\:+\:46\:+\:-1$
$x-20=50$
$\frac{dy}{dx}=y\left(2x+3\right)$
$\left(7n^4b\right)^2$
$2\cdot\left(2\right)^{-3}$
$5\left(x+3\right)=7x-1$
$x^2-\frac{8}{3}-8$
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