... \begin{equation} \begin{split} \frac{\partial^2 \nabla}{\partial \nabla^2}&=x^2 + yimc^2=z^2 \\ &=\mathrm{x^2 + y^2 = z^2} \\ &=\mathbf{x^2 + y^2 = z^2} ...
確定！ 回上一頁
