# Internal energy

Define $$A\to B$$ as the change in internal energy from A to B.

Find the value of $$\{A\to E \}+ \{ A\to B\} - 2\{A\to C\} - 2\{C\to D\} -2\{D\to E\} - \{E\to F\} -\{F\to B\}$$

×