$\lim_{x\to\infty}\left(\frac{4^x+2}{3x^3+x^2+5x+1}\right)$

$m^2+8m+12$

$\int\frac{\sin\left(x\right)}{\cos^6\left(x\right)}dx$

$\lim_{x\to1}\frac{1-\cos\left(4x\right)}{x\sin\left(5x\right)}$

$-2+7-5-6+9+1$

$\left(2z-3k\right)^4$

$\lim_{x\to0}\left(\frac{3x\left(cos\left(4x-1\right)\right)}{sin\left(6x\right)-6}\right)$