1.偏导
\frac{\partial f}{\partial x}
∂ f ∂ x \frac{\partial f}{\partial x} ∂x∂f
2.求导
\frac{\mathrm{d} y}{\mathrm{d} x}
d y d x \frac{\mathrm{d} y}{\mathrm{d} x} dxdy
3.形如 x ′ x^{'} x′求导
x^{'}
x ′ x^{'} x′
4.形如 x ˙ \dot x x˙求导
\dot x \ddot x
x ˙ x ¨ \dot x \ddot x x˙x¨
5.拉普拉斯算子 ∇ \nabla ∇
\nabla f
∇ f \nabla f ∇f