Create MATLAB code to generate and plot four different mathematical functions on the same graph within the range [3,3][3,3]. Plot these curves using different line styles, colors, and markers. Include appropriate labels for the axes, a title for the plot, and a legend that distinguishes between the four curves.

Functions to plot:

1. f(x)=sin(x)
2. g(x)=cos(x)
3. h(x)=x^3x
4. (x)=1/(1+e^(x))