Dalton, Hunter, and Alex started a Superhero Fan Club. They set a goal to watch as many Superhero movies as they could in one summer. Dalton watched 7 movies, Hunter watched 12, and Alex watched 15. They all watched 2 movies together, but every other movie they watched was different. How many different movies did they see?
Dalton watched 7 - 2 = 
<gadget id="calculator">7-2</gadget>
<output>5</output>
5 more movies.
Hunter watched 12 - 2 = 
<gadget id="calculator">12-2</gadget>
<output>10</output>
10 more movies.
Alex watched 15 - 2 = 
<gadget id="calculator">15-2</gadget>
<output>13</output>
13 more movies.
Altogether, they watched 2 + 5 + 10 + 13 = 
<gadget id="calculator">2+5+10+13</gadget>
<output>30</output>
30 different movies.

<result>30</result>