$\frac{d}{dx}3\cos x-5\cot x$
$\frac{dy}{dx}=\frac{\pi y\left(cos\left(2\pi x\right)\right)}{\:\left(sin\left(2\pi x\right)\right)}$
$\left(x^2\:-\:z^2\right)^3$
$5x\cdot6x^3y$
$6x^2+60x+24=0$
$y=\frac{1}{4}x-1$
$cos4x-2sin3xsinx$
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