$\frac{x^{10}-49}{x^5+7}$
$b^{-10}.\:\frac{b^{-1}}{b^5}$
$3+4\cdot6-2$
$\infty\:+\infty\:+\infty\:-14$
$\left(-3x^4+2x^5\right)^5$
$196c^4-121a^6c^6$
$x^2-0.25$
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