$\int8xe^{-3x}dx$

$\log_b\left(x+2\right)+\log_b\left(x\right)=\log_b\left(24\right)$

$\frac{25n^2}{16y^2}-\frac{4a^2}{9x^2}$

$2\cdot6^4$

$\cos^{2}x-\frac{1}{2}=\sen^{2}x-\frac{1}{3}$

$\int\frac{\left(x^2+3\right)}{x\sqrt{x^2+4}}dx$

$2-\left(-8\right)-\left(-3\right)$