14. (1x3−3x2+3x−1)103{(\frac{1}{{x}^{3}}-\frac{3}{{x}^{2}}+\frac{3}{x}-1)}^{\frac{10}{3}}(x31−x23+x3−1)310的展开式中,1x3\frac{1}{{x}^{3}}x31的系数为((( )))