$\lim_{x\to\infty}\left(ln\left(\frac{x-1}{x+4}\right)\right)$

$\:x+x+x\:+\:2x+x+x+2$

$343x^6+125$

$\left(\tan^2\left(x\right)\right)\left(\csc^2\left(x\right)\right)=\sec^2\left(x\right)$

$\left(4ab^6\right)\left(-7a^2b^3\right)$

$\frac{6}{1-\sin\left(x\right)}+\frac{6}{1+\sin\left(x\right)}=12\sec^2\left(x\right)$

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