$7\left(0.5\right)+5-8\left(0.25\right)$

$\frac{12a^3b^3c}{-2a^{-2}b^{-3}c^4}$

$\frac{x^5-5x^3+4}{x+1}$

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

$\lim_{x\to\infty}\left(\frac{3x+1}{2-\sqrt{x^2-4}}\right)$

$\int_1^{\infty}\frac{1}{\sqrt{\pi}x}dx$

$x^2+10x-7$