$\lim_{x\to0}\left(\frac{\sin\left(\pi x\right)}{x^2-w}\right)$

$\lim_{x\to-\frac{\pi}{4}}\left(\tan\left(x\right)\right)$

$\frac{\left(x^6\right)^4}{\left(x^2\right)^4}$

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

$\lim_{x\to\infty}\left(\frac{x^3-5x^2+6}{-x^2+4}\right)$

$\frac{1+3tan\left(5\right)}{sec\left(5\right)}$

$4-x\:=\:2+y$