$113,9-43,7$

$146-25+8-30$

$\lim_{x\to0}-\left(x^2-2x\right)^{x^2}$

$\int\:\frac{2x+1}{2x^2-x+6}dx$

$\left(x-5\right)\left(x^2+5x+25\right)$

$\int_{\frac{\pi}{3}}^{\frac{\pi}{2}}\left(\frac{\left(sinx\right)}{\sqrt{1-2cosx}}\right)dx$

$\int\left(x^2-9\right)-\left(2x^2+5x-3\right)dx$