$\frac{cos4x+1}{sin4x}=cot2\left(x\right)$
$\frac{7+8\:cos\left(y\right)}{8+7\:sec\left(y\right)}$
$\lim_{x\to0}\left(\frac{xcos\left(x\right)}{\left(x+1\right)+sin\left(x\right)}\right)$
$3x^2y-27y$
$\int6t^2e^{-t^3}dt$
$\int\left(3x^2-5\right)^7dx$
$2x^33-4x^2+2x$
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