$y=-4\left(3x^2+3x\right)^2-4\left(3x^2+3x\right)$
$2cos2x=sin2xcotx-2sin^2x$
$\left(5x^3+9y\right)^2$
$\frac{dy}{dx}-\frac{1}{x}y=x^2e^x$
$\log_a\left(27\right)$
$ln\left(4x^2-4x+1\right)$
$\sin^2\left(y\right)\left(\csc^2\left(y\right)-1\right)$
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