\begin{equation}
\begin{aligned}
&&P &= (w_{p_1},w_{p_2},...,w_{p_w}) \times &\\
&& \ & \times (w_{p_1}},w_{p_2}},...,w_{p_w}})^T.&\\
&&\ &= p_{i}\times C_{i}^{c}\times (p_{i})^T.&
\end{aligned}
\label{PSqrt}
\end{equation}
Do an example of their own, I hope to help you, the red part of the overall left alignment, the green part of the equal sign alignment, \ for the space, \\\ for the number.