$\left[\sqrt[2^{18}]{\left[\left(x^4\right)^{64^2}\right]^8}.x^{16^4}\right]^{\frac{4}{3}}$

$\int e^{8x+1}dx$

$\frac{2x^2+1}{x-1}$

$\cot\left(a\right)=\frac{1+\cos\left(2a\right)}{\sin\left(2a\right)}$

$-\frac{360}{-10}$

$\left(x+1\right)\frac{dy}{dx}-x=6$

$81\cdot25$