$125x^3+8$

$\lim_{x\to0}\left(\frac{xe^x}{e^x}\right)$

$y=\frac{x'}{3}$

$\sin^21+\cos^21$

$\int_{45}^{90}\left(\frac{1}{\left(sen\left(x\right)\right)^2}\right)dx$

$\left(\frac{4}{9}x^2-\frac{1}{6}x-\frac{1}{8}\right)\left(\frac{2}{3}x-\frac{1}{2}\right)\left(\frac{2}{3}x+\frac{1}{4}\right)$

$x^2-7x+6$