$\:0\::\:-\:45$

$\ln\left(y\right)=\ln\left(\frac{e^{2x}\left(x^2-5\right)}{x^3}\right)$

$\left(7a^4b^3-cd5\right)\left(7a^4b^3+cd^5\right)$

$3x^2-28-17x\:entre\:3x+4$

$\log\left(10x+5\right)-3=\log\left(x-5\right)$

$\lim_{x\to\infty}2\cos\left(2x\right)+x$

$7^3\cdot2^3$