$\int_1^{\frac{\pi}{4}}\left(\frac{1}{25+16x^2-32x}\right)dx$

$\left(2x-3\right)\left(2x+3\right)\left(16x^4+36x^2+81\right)\left(64x^6+4\right)$

$\frac{d}{dx}\left(2x^4-8x^3+9x-2\right)$

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

$\frac{1-cosx}{senx}=0$

$1348-50+736-828+584-773$

$\frac{2}{3}\:+\frac{2}{6}$