This is LaTeX code:

[latex]
 \lim \frac{\cos 3x \cdot (e^{3x^2} -1) \cdot 3x^2}{(\sin x)^2 \cdot 3x^2} - \lim \frac{(1 - \cos 3x) \cdot 3x}{(\sin x)^2 \cdot 3x}= \lim \frac{\cos 3x \cdot 3x^2}{(\sin x)^2} - \lim \frac{3x}{(\sin x)^2}=
[/latex]