$4n^42n^{-3}$
$\cos\left(3y\right)=\left(1-4\sin^2y\right)\cos\left(y\right)$
$\int2xe^{9x}dx$
$y^'=3y-4y^2$
$xy'\:+\:y=3x^2$
$\left(10x+13\right)\left(15x+16\right)+\left(10x+9\right)\left(15x+8\right)$
$\left(675\right)\left(\frac{1}{28.35}\right)\left(\frac{1}{8}\right)$
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