particle physics - Is there an equation for the strong nuclear force?

The equation describing the force due to gravity is

$$F = G \frac{m_1 m_2}{r^2}.$$ Similarly the force due to the electrostatic force is $$F = k \frac{q_1 q_2}{r^2}.$$

1. 
   

   Is there a similar equation that describes the force due to the strong nuclear force?

   
   


2. 
   

   What are the equivalent of masses/charges if there is?

   
   


3. 
   

   Is it still inverse square or something more complicated?