$\frac{dy}{dx}=log\sqrt{4-x^2}$

$\left(\frac{\left(x+1\right)}{\left(x-1\right)}\right)^3$

$\cos2\theta^{\prime}-3=-7\cos\theta$

$\int_1^2\left(3x^2d-4x\right)$

$16x^2+16x^3+9x^4$

$\frac{1+sin\left(u\right)}{\cos\left(u\right)}+\frac{cos\left(u\right)}{1+sin\left(u\right)}$

$\log_{10}\left(x\right)=12.15$