```tex
\begin{equation}\label{age}
\begin{align}
&\triangle Energy = 4000p_{1}\triangle w + 9000p_{2...
```tex
\begin{equation}\label{age}
\begin{align}
&\triangle Energy = 4000p_{1}\triangle w + 9000p_{2}\triangle w + 4000p_{3}\triangle w \\
&Y(t)=C_{t}+\sum_{i=1}^3\int_0^{1}\sum_{j=0}^5 a_{ij\phi j}(t+\triangle t)x_{i}(t+\triangle t)d\triangle t
\end{align}
\end{equation}
```
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