Note that in every pass through step 3, the equation holds true.

If this equation does not hold, then n is not prime.

If n is composite, then this equation usually does not hold (see, page 1392).

However, his equation did not hold for some phenomena such as the speed of light.

That equation will not hold in the future, when five-year limits are reached.

War always equals loss of life; this equation holds no surprise.

But unfortunately the equation of science with common sense does not really hold good.

The equation does not hold close to the pipe entrance.

Continuing this way we can see that the equation above holds.