E=MC^2 the two means that the C at the end of the formula is squared, the 2 is an exponent (meaning that you times C by itself)
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M stands for Mass
c = the speed of light.
The speed of light in vacuum.
it means e = MC2 which is M x c x 2
There is no sum of e=mc2, it is an equation concerning matter and energy. e=mc2 stands for: Energy equals mass times the velocity of light squared. E = M C 2