$46-56-38+26-18$

$\lim_{x\to\pi}\left(\frac{sin\left(2x\right)}{\pi-x}\right)$

$\lim_{x\to-\infty}\left(\frac{ln\left(2-x\right)}{\sqrt{2-x}}\right)$

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

$\frac{4\sqrt{x}}{\sqrt{x}-y}$

$86+36$

$\left(r^2-2\cdot r\cdot x\cdot cos\left(\theta\right)+x^2\right)^{0.5}$