Jess made 3 different stacks of wooden blocks. The first stack was 7 blocks high, the second stack was 5 block(s) higher than the first, and the final stack was 7 block(s) higher than the second. Jess’ little sister knocked over the entire first tower, in the second tower she left 2 blocks standing, and in the final tower she left 3 blocks standing.  How many blocks in total fell down?
Jess' second stack was 7 blocks + 5 blocks = 
<gadget id="calculator">7+5</gadget>
<output>12</output>
12 blocks.
Jess' third stack was 12 blocks + 7 blocks = 
<gadget id="calculator">12+7</gadget>
<output>19</output>
19 blocks high.
Jess' sister knocked down the second tower and knocked 12 blocks - 2 = 
<gadget id="calculator">12-2</gadget>
<output>10</output>
10 blocks knocked over.
Jess' sister knocked down the final tower and knocked 19 blocks - 3 = 
<gadget id="calculator">19-3</gadget>
<output>16</output>
16 blocks knocked over.
Total blocks knocked over was 7 blocks + 10 + 16 = 
<gadget id="calculator">7+10+16</gadget>
<output>33</output>
33 blocks.

<result>33</result>