Convert the following infix notation to prefix form.

Infix: $(A-B)/C*(D+E)$ Step 1: $(A-B) \to {-}AB$ Step 2: $(A-B)/C \to {/}{-}ABC$ Step 3: $(D+E) \to {+}DE$ Step 4: Combine the two results with $*$: ${*}\ {/}{-}ABC\ {+}DE$ Prefix form: $*/-ABC+DE$