利用者:＊猫草粥雑炊仕立て＊/sandbox

${\color {blue}d\phi ={\frac {\partial \psi }{\partial x}}dx+{\frac {\partial \psi }{\partial y}}dy+{\frac {\partial \psi }{\partial z}}dz}$　、 構文解析に失敗 (構文エラー): {\displaystyle {\color{#FF9933}\iiint_V \operatorname{div}\mathbf{F}\cdot dxdydz=\iint_S \mathbf{F}\cdot \mathbf{n}dS}} 　、 構文解析に失敗 (構文エラー): {\displaystyle {\color{#FF0099}\oint_{C}\mathbf{F}\cdot d\mathbf{r}=\iint_S \operatorname{rot}\mathbf{F}\cdot \mathbf{n}dS }}