When x=3, y=5, what is the value of 5y-2x**2
当x=3，y=5时，5y-2x**2的值是多少
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<gadget id="calculator">25 - 18</gadget>
<output>7</output>

<result>7</result>