$16x^2-36$

$\int_0^{\pi}\left(x+x^2\right)\cdot\cos\left(x\right)dx$

$\lim_{x\to5}\frac{3-\sqrt{2x-1}}{3\left(\sqrt{5x-5}\right)}$

$\frac{1}{2}x\left(1-x\right)^{-\frac{1}{2}}.\left(1-x\right)^{\frac{1}{2}}$

$-78.15+\left(-14.387\right)$

$\int_{\infty}^7\left(\frac{x}{x^2-4}\right)dx$

$\lim_{x\to0}\left(\frac{\left(8^x-7^x\right)}{4^x-3^x}\right)$