$x^{2}-\frac{2x}{y^{2}}=-12x$

$4y^3\left(\frac{dy}{dx}\right)=3sqrt\left(x\right)$

$\frac{dy}{dt}=4t-12ty-10t\cdot\sin\left(2t\right)$

$tgx\left(1-ctgx\right)+ctgx\left(1-tg^2x\right)+\left(1-cos^2x\right)$

$3\left(-8\right)$

$\int\cos\left(7t\right)\cos\left(5t\right)dt$

$49w^2+56w+16$