$\lim_{x\to0}\left(\frac{e^x-1}{cos3x}\right)$

$\left(2x-6y\right)^2$

$\frac{d}{dx}x^{2lnx}$

$-15a^x-69y+72a^x-6y+5y$

$\left(p^2-5p+4\right)-\left(4p^2-9p+11\right)$

$\left(\frac{1}{5}\right)\log_m\left(w\right)+6\log_m\left(z\right)-\log_m\left(x\right)$

$\lim_{x\to\infty}\left(\frac{6x^2}{e^{7x}}\right)$