This appears to be a chemical formula showing the reaction between magnesium nitride (Mg3N2), nitrogen gas (N2), ammonia gas (NH3), and ammonium sulfate ((NH4)2SO4).

The reaction between magnesium nitride and nitrogen gas likely produces magnesium nitride. This compound can react with ammonia gas to form magnesium amide and hydrogen gas. Finally, the magnesium amide can react with ammonium sulfate to form magnesium sulfate, ammonia gas, and ammonium nitrate.

The overall reaction can be represented as:

Mg3N2 + 4NH3 + 2(NH4)2SO4 -> 3MgSO4 + 4NH4NO3

This reaction involves double displacement and redox reactions.