If a**2-a+1=0, the value of 3a**2-3a+5.
若a**2-a+1=0，3a**2-3a+5的值．
<gadget id="calculator">3 * (-1)</gadget>
<output>-3</output>

<gadget id="calculator">(-3) + 5</gadget>
<output>2</output>

<result>2</result>