$\left(x^2y^3-\frac{y^3}{x^2}\right)^4$

$-x^2+4x-4$

$-\left(-458\right)-\left(-67\right)-\left(+796\right)-\left(+37\right)-\left(+897\right)-\left(-7632\right)$

$\lim_{x\to0}\left(\frac{x}{cos\left(\frac{\pi}{2}-x\right)}\right)$

$-7x-5x$

$23.77+40+2.38+18.33-25$

$5x+3>3x-2$