$x^2+12x=-20$

$\int_{3.8}^{5.5}\left(6e^f-12f^5\right)df$

$100x^2+340x+289$

$\lim_{x\to0}\left(\frac{\cos\left(x\right)}{sen\left(x\right)}\right)^{sen\left(x\right)}$

$4x^5+4x^4-57x^3-97x^2+14x+24$

$7x-5>3x-11$

$\frac{dy}{dx}=\frac{\left(1+x\right)\left(y-1\right)^2}{x^2y+x^2+4y-4}$