Define operation: "*" and "△", satisfy a*b=(a△b)-2a, and a△b=2*(a*b)-b, then, (3*2)+(2* 3) how much.
定义运算："*"和"△"，满足a*b=(a△b)-2a，且a△b=2*(a*b)-b，那么，(3*2)+(2*3)多少．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

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

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<result>15</result>