User:Johnd92021/sandbox

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From math type equation editor: $$\sqrt{a^2 +  b^2} $$

From mathJAX: $$ J_\alpha(x) = \sum\limits_{m=0}^\infty \frac{(-1)^m}{m! \, \Gamma(m + \alpha + 1)}{\bigl({\frac{x}{2}}\bigr)}^{2 m + \alpha} $$

The formula for water is $$ H_2O $$

From Wever, physics, Tex:

$$ r=(x,y,z) $$

$$ v=(\dot{x},\dot{y},\dot{z}) $$

$$ a=(\ddot{x},\ddot{y},\ddot{z}) $$