$1+secx\left(1-secx\right)$
$\frac{5a^3b^3c^2}{-a^2b^2c}$
$\int\left(\frac{1}{\left(1-4x\right)^4}\right)dx$
$m^2+7+49$
$2x^4+5x^3-54x-135$
$\left(x^5-x^4+x^2-2\right)-\left(x^2+1\right)$
$x2\:-\:13x\:-\:14\:>\:0$
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