Colton had 72 dolphin stickers. He gave 4 stickers each to 3 friends.  He also gave his friend Mandy 2 more than he gave his three friends total.   And he gave Justin 10 less than Mandy.  How many stickers does Colton have left?
Colton gave away 4 stickers * 3 friends = 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12 stickers.
Colton gave Mandy 2 + 12 stickers = 
<gadget id="calculator">2+12</gadget>
<output>14</output>
14 stickers.
Colton gave Justin 14 stickers - 10 = 
<gadget id="calculator">14-10</gadget>
<output>4</output>
4 stickers.
In total, Colton gave away 12 + 14 + 4 stickers = 
<gadget id="calculator">12+14+4</gadget>
<output>30</output>
30 stickers.
Colton's number of total stickers at the end is 72 - 30 = 
<gadget id="calculator">72-30</gadget>
<output>42</output>
42 stickers.

<result>42</result>