$\lim_{x\to5}\left(\left(x-5\right)^2\cdot\frac{cos\left(2x\right)}{x^3-20x^2+125x-250}\right)$

$\frac{2}{\pi}\int_0^{\pi}\frac{5}{\pi}x\sin\left(4x\right)dx$

$a^2-ab+b^2^2$

$\frac{dy}{dx}\:-2y=e^{2x}$

$-3-x-2x+3x^2$

$\lim_{x\to5}\left(\frac{35sin^2\left(\pi x\right)cos^2\left(\pi x\right)}{2\pi^2\left(x-5\right)^2}\right)$

$2045-2045+1915$