$\left(2x+1\right)^2y^3+2\left(2x+1\right)y^2+y=0$

$\lim_{x\to1}\left(\frac{sin\left(x\right)-sin\left(1\right)}{x-1}\right)$

$\lim_{x\to0}\sqrt{x}e^{\sin\left(\frac{1}{x}\right)}$

$\frac{\left(5^2\right)^3}{\left(5^3\right)^7}$

$\frac{\sec^2\left(x\right)-1\:+\left(\sec\left(x\right)+\cos\left(x\right)\right)\sec\left(x\right)}{\sec\left(x\right)\tan\left(x\right)}=0$

$\left(7p+8\right)\left(7p-8\right)$

$1+cot^2y$