Let a and b both represent numbers, stipulate that a⊙b=b*b-2*a, find (4⊙5)⊙(2⊙4)=how many.
设a、b都表示数，规定a⊙b=b*b-2*a，求(4⊙5)⊙(2⊙4)=多少．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">16 - 4</gadget>
<output>12</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">25 - 8</gadget>
<output>17</output>

<gadget id="calculator">17 * 2</gadget>
<output>34</output>

<gadget id="calculator">144 - 34</gadget>
<output>110</output>

<result>110</result>