化学

11111

链接文字\[ 

\frac{\textcolor{cyan}{\sin\phi}}{\textcolor{red}{\int_{\phi}^{\phi^2} \cos\theta \, d\theta}} + a_\phi = \frac{a_{\phi + \frac{\pi}{6}}}{\phi^2} \quad \text{其中 } \phi \geq 0, \\ a_0 = 0 

\]