$\left(\frac{b^{-1}}{a^{-1}}\right)^{a+b}$

$\lim_{x\to0}\left(\frac{1}{x^1}\right)^{2x}$

$\sec b\cot b$

$\int_0^{\frac{\pi}{4}}\left(\left(\frac{cosx}{sinx^{\frac{4}{3}}}\right)\right)dx$

$2\cdot2\cdot2^{-1}$

$\frac{d^2}{dx^2}\left(-4\sin\left(x\right)\right)$

$60\::\:\left(-5\right)$