$\lim_{x\to0}\left(\ln\left(1+x\right)\right)^{\frac{x}{\ln\left(x\right)}}$

$\lim_{x\to0}\left(\frac{\cos\left(ax\right)+b}{x^2}\right)$

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

$12-f+f^2$

$\lim_{x\to\infty}\left(\frac{x-1}{x^2+6x+4}\right)$

$\left(s-10\right)^2$

$\frac{\left(3x^4+0x^3-2x^2+3x-1\right)}{x+3}$