Intro college Physics is reformatting formulas to solve for variables in other formulas, and inserting them into each other. So even if c = (w+x+y+z), e=mc^2 a

Intro college Physics is reformatting formulas to solve for variables in other formulas, and inserting them into each other. So even if c = (w+x+y+z), e=mc^2 and e=m(w+x+y+z)^2 would still be equivalent.