$\left(-4\right).\left(+1\right).\left(+5\right).\left(-8\right)$

$\left(3-\sqrt{5}\csc\left(x\right)\right)\left(csc\left(x\right)-2\right)=0$

$\lim_{n\to\infty}\sqrt[n]{\left(\frac{n}{n+1}\right)^{n^2}}$

$\int-\left(3x-4x\right)\ln\left(x\right)dx$

$x'=-2tx,\:x\left(1\right)=\frac{1}{2}$

$-2.3+2.1$

$\frac{dy}{dt}=30t^5e^{-y}$