Devorah is filling a pool with a hose. The volume, ${H}$, in liters, of water coming out of the hose in ${m}$ minutes is given by the function ${H}({m})=17.4 {~m}$. However, it is a sunny day, and water is also evaporating from the pool. Therefore, the volume, $V$, in liters, of water in the pool $m$ minutes after Devorah started filling it is given by $V({~m})=17 {~m}$.

Let ${E}$ be the volume of water, in liters, that has evaporated from the pool ${m}$ minutes after Devorah started filling it.

Write a formula for ${E}({m})$ in terms of ${m}$.