$\:\int cos4x\:senx\:dx$
$70<7y$
$\left(x^m+5y^n\right)\left(x^m+7y^n\right)$
$0.375-0.225$
$64x^6-8y^3$
$y^'=\frac{1}{x^2+1}$
$20-50-60+0$
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