$\left(8cscx-16\right)\left(4cosx-4\right)$

$\lim_{x\to0}\left(\frac{\ln\left(x+1\right)+5\cdot\sin\left(3x\right)+\sin\left(2x\right)}{x^2}\right)$

$\frac{cos\left(x\right)^4}{sin\left(x\right)^2}$

$-\frac{3}{8}c^3d^5+\frac{3}{4}d$

$\frac{16x^4-32x^2+16}{x^4}$

$\int\sqrt{4-\left(x-6\right)^2}dx$

$x^{\frac{7}{2}}y^2+4y$