The quadratic formula is \(x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\).
Fórmula Integral de Cauchy: \(f(a) = \frac{1}{2\pi i} \oint\frac{f(z)}{z-a}dz\)
$$ \int_{2}^{5} f(x) $$