$4pq^3+4pq^3-8pq^3$
$sinxcosx+cos^2xcotx$
$\left(2c\:-\:2\right)\:\left(2c\:+\:2\right)$
$\frac{\left(2-\left(cos\right)^2\:\left(a\right)\right)}{\left(sen\:\left(a\right)\right)}=csc\:\left(a\right)+sen\:\left(a\right)$
$\sqrt[2]{363}$
$\int\frac{e^{2\cdot x}-e^{4\cdot x}}{e^x}$
$5x-13>-15x+7$
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