Kim has 12 nail polishes. Heidi has 5 more nail polishes than Kim, and Karen has 4 fewer nail polishes than Kim. How many nail polishes does Karen and Heidi have together?
Heidi has 12+5 = 
<gadget id="calculator">12+5</gadget>
<output>17</output>
17 nail polishes.
Karen has 12-4 = 
<gadget id="calculator">12-4</gadget>
<output>8</output>
8 nail polishes.
Heidi and Karen have 17+8 = 
<gadget id="calculator">17+8</gadget>
<output>25</output>
25 nail polishes together.

<result>25</result>