$81+x^8-6\cdot4$
$18z-9d=75$
$\sqrt{0.0013212884}$
$4x+\left(-6v-2u+9v+u\right)$
$\int_0^{\infty}\left(\frac{xarctanx}{\left(1+x^2\right)^2}\right)dx$
$\left(3+x^2\right)\frac{dy}{dx}=6x\:+yx$
$6x^5+9$
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