$xy+5=0$
$-6898\:+\:-2040$
$\left(-13\:\:x-2\right)+-12$
$\left(+3\right)^{14}\::\:\left(+3\right)^{10}$
$\frac{d^2}{dx^2}\left(48x^5+6+\frac{2}{x^2}\right)$
$\int_1^224x^7-36x^5+25x^4-2x\:dx$
$6x^2-3xy-9x^2+31x+9y+40$
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