$t^2-5t-50$
$\lim_{x\to2}7$
$\frac{7x^6+x^3\:+2x+5}{x^2}$
$\frac{8d^2}{2d}$
$\left(g^9h^9j^{-5}\right)^6$
$-\frac{8c^{-2}}{2c^3}$
$2.29-2.27$
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