$\frac{\left(4\right)^{10}\cdot\left(-4\right)^3\cdot\left(-4\right)^7}{\left(4\right)^{15}\cdot\left(-4\right)^7}$

$\frac{dy}{dx}=24-6x-4y+xy$

$\lim_{x\to-1}\left(x^3+1\right)\lim_{x\to-1}\left(y+1\right)$

$4y^2-36yw+81w^2$

$4\sin^2x+7\sin x=2$

$\left(6^2\right)^4$

$\frac{\sin^2\cdot\cos^2-\cos^2}{1-\sin^2}$