Frank is practicing a new dance move.  It starts with him take 5 steps back, and then 10 steps forward, and then 2 steps back, and then double that amount forward.  How many steps forward is Frank from his original starting point?
Frank stars by taking 10 steps forward from a position 5 steps behind where he started, so he's 10-5= 
<gadget id="calculator">10-5</gadget>
<output>5</output>
5 steps forward in total.
Frank then takes 2 steps back, meaning he's now 5-2=
<gadget id="calculator">5-2</gadget>
<output>3</output>
3 steps forward in total from where he began.
He then takes double the previous amount of 2 steps forward, so he takes 2*2= 
<gadget id="calculator">2*2</gadget>
<output>4</output>
4 steps forward.
Since Frank was 3 steps forward before that, that means Frank finishes 3+4=
<gadget id="calculator">3+4</gadget>
<output>7</output>
7 steps forward.

<result>7</result>