用normcdf函数来表示F
syms x t real
  L8 {1 f, x3 Q# I( n! n% `F = @(t) normcdf(t);
2 n7 [, q2 F0 @y = 85*x - 100*int( F(t), t, 0, x );
' I# a* N$ c* b3 i" Y' Dy = matlabFunction(y);