F1=0.01X2-0.125X3+0.192X4-0.045X5-0.058X6+0.106X7+0.173X8-0.017X9+0.151X10+0.096X11+0.194X12+0.093X13+0.135X14

F2=0.323X2+0.101X3-0.084X4-0.123X5+0.162X6+0.037X7-0.005X8+0.376X9-0.027X10-0.099X11+0.032X12+0.236X13+0.05X14

F3=-0.09X2+0.291X3-0.13X4+0.612X5+0.233X6+0.138X7-0.054X8-0.249X9+0.068X10+0.260X11-0.3X12-0.138X13+0.034X14
应该有简便的方法或是使用软件之类的吧。