$18m^2+24mn+8n^2$

$\lim_{x\to1}\left(\frac{\ln\left(1+x^2\right)}{\cos\left(3x\right)-e^{-x}}\right)$

$f\left(x\right)=6\left(3x^3+x^2\right)^3$

$sec\left(x\right)=csc^{-1}\left(x\right)$

$10-\left(3\right)\left(4\right)+\frac{4}{2}$

$\int t^3e^{4t}dt$

$3x+2y=24$