$\frac{\infty^{\infty}}{\infty^{\infty}}$
$\frac{x^5-4x^3+x-1}{x^2-1}$
$26\cdot21$
$4u^2\:-u^2+3st^3$
$-128h^3-2$
$\left(-7\right)\left(+3\right)-\left(-2\right)\left(-8+16\right)$
$\int3m^2ntdt$
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