$\lim_{x\to\infty}\left(8\cdot x\cdot e^{\frac{6}{x}}-8\cdot x\right)$

$\left(x^2+5x-3\right)^3$

$2cos\left(y\right)-sin\left(y\right)y'=0$

$\frac{20a^5b^4k}{5a^2bk}$

$\int\left(\frac{1-u}{u}\right)du$

$\frac{sin\left(x\right)}{csc\left(x\right)-\cot\left(x\right)}$

$\left(-4+w\right)\left(-4-w\right)$