$13,3\:+48,84$
$2sin\left(s\right)=-2sin\left(t\right)$
$\frac{4}{5p^{-2}m^{-7}}$
$y^2\:+\:11y\:-\:6y\:+\:y^2$
$sqrt\left(\frac{sec\:t\:-\:cos\:t}{sec\:t}\right)$
$x^2-11x-11$
$25x^5-5x^4+14x^3$
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