Suppose m and n are not zero, 3x**2y**3 and -5x2+2m+ny**3 are similar items, then ((3m**3-m**2n+3mn**2+9n* *3)/(5m**3+3m**2n-6mn**2+9n**3))=how much.
设m和n均不为零，3x**2y**3和-5x2+2m+ny**3是同类项，则((3m**3-m**2n+3mn**2+9n**3)/(5m**3+3m**2n-6mn**2+9n**3))=多少．
<gadget id="calculator">55 / 97</gadget>
<output>55/97 = around 0.56701</output>

<result>55/97 = around 0.56701</result>