$\cos\left(x\right)+\sin\left(x\right)\tan\left(x\right)=1+\cos\left(x\right)$
$1-\sqrt{x}\cdot2\sqrt{x}$
$cos^2x=0.6$
$\left(27-y\right)^2$
$s^2-4s-5$
$\frac{\left(x^{2}\right)^{3}\left(2x^{3}\right)^{3}}{4x^{2}}$
$\frac{dy}{dx}=3y-x^2$
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