$\int\left(\left(2\:+\:\frac{2}{x}\right)\:\sin\left(x\:+\:\ln\:\left(x\right)\right)\right)dx$

$\int\frac{2x+1}{\left(x^2+4\right)^2}dx$

$\left(-3x^2+4x-7\right)-\left(x^3+4x-\frac{3}{4}x\right)$

$3x+1y+1y+1x+1y+2x+1y$

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

$\lim_{x\to0}\left(\frac{\ln\left(3t\right)}{t^2}\right)$

$\lim_{x\to0}\left(\frac{e^{2x}-1}{3x^2}\right)$