$\lim_{x\to0}\left(\frac{tanx}{3x^2-x}\right)$

$\sin\left(\arccos\left(\frac{3}{4}\right)-\arctan\left(\frac{1}{4}\right)\right)$

$\left(x+1\right)\left(x+2\right)\left(x+3\right)\left(x+4\right)+6$

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

$0^6+64q^6$

$\lim_{x\to0}\left(\frac{\ln\left(x^2+x\right)}{\ln\left(x\right)}\right)$

$\frac{4x^2+2x+2}{\sqrt{x}}$