Mara added 3 slices of cake to a plate that already had 2 slices on it. She was getting hungrier so she tripled the number of slices she currently has. She ate 2 slices and while she was distracted, her friend stole 5 slices off her plate. What number of cake slices remained on the plate?
Mara had 3+2=
<gadget id="calculator">3+2</gadget>
<output>5</output>
5 slices of cake.
She was hungry and tripled the amount to 5*3=
<gadget id="calculator">5*3</gadget>
<output>15</output>
15 slices.
She ate a couple, leaving 15-2=
<gadget id="calculator">15-2</gadget>
<output>13</output>
13 slices.
Her friend came and stole some which left Mara to 13-5=
<gadget id="calculator">13-5</gadget>
<output>8</output>
8 slices.

<result>8</result>