Rearrange the formula \((s2 a2 x2)/(22 u4) = h\) to make \(h\) the subject.

The formula provided is:

$$\frac{s^2 a^2 x^2}{2^2 u^4} = h$$

Calculate $2^2$:

$$2^2 = 4$$

Substitute this value back into the formula:

$$\frac{s^2 a^2 x^2}{4 u^4} = h$$

The variable $h$ is already isolated on one side of the equation. Therefore, $h$ is already the subject of the formula.

The final answer is:

$$h = \boxed{\frac{s^2 a^2 x^2}{4 u^4}}$$