The number of symmetry axes of a rectangle is a, the number of symmetry axes of a square is b, and the number of symmetry axes of an isosceles trapezoid is c, then 2a+b**2+c**3=how many.
长方形的对称轴条数是a，正方形的对称轴条数是b，等腰梯形的对称轴条数是c，则2a+b**2+c**3=多少．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">1 ** 3</gadget>
<output>1</output>

<gadget id="calculator">4 + 16 + 1</gadget>
<output>21</output>

<result>21</result>