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

$59.99+893$

$-6-1\cdot4$

$\lim_{x\to\infty}\left(\frac{\pi-2\arctan\left(x\right)}{e^{\frac{3}{x}-1}}\cdot e^{-x}\right)$

$\int\frac{x^3+x^2+2x+1}{\left(x^2+2x+5\right)}dx$

$\frac{2}{\frac{1}{5}}$

$\left(1\:-\:i\right)z\:+\:\left(1\:-\:i\right)z\:=\:4$