Final answer:
The equation that represents the given expression is Newton's equation, F = G*M*m, where G is the universal gravitational constant.
Step-by-step explanation:
The equation that represents the given expression is Newton's equation, which is F = G*M*m. In this equation, F represents the gravitational force between two objects, M represents the mass of the larger object, m represents the mass of the smaller object, and G is the universal gravitational constant. G is a constant that has the same value anywhere in the universe and is approximately equal to 6.67 x 10⁻¹¹ N·m²/kg².
By using this equation, we can calculate the gravitational force between two objects and solve problems involving objects on or orbiting Earth or other massive celestial objects.