$\sin\left(2x\right)\sec\left(2x\right)=\tan2x$

$\int\ln\left(x^3+1\right)dx$

$\int\frac{49}{\left(7x+9\right)^8}dx$

$\frac{dy}{dx}\left(3e^{2x}\right)$

$\:\left(2x\:+\:\frac{2}{5}\right)\:\left(\:2x\:-\frac{2}{5}\right)$

$\frac{3x-4}{x-5}\:=\frac{3x+6}{x+2}$

$1.22\cdot.5$