t=0:0.05:1;
x0=3+0.9*t-3.3*t.^2+1.4*t.^3;
y0=6+1.5*t-13.5*t.^2+8*t.^3;
x1=2+2.4*t+4.2*t.^2-2.5*t.^3;
y1=2+3*t+5.4*t.^2-4.4*t.^3;
x2=6-0.6*t-3.3*t.^2+2.9*t.^3;
y2=6-3*t-4.5*t.^2+3.5*t.^3;
x3=5+1.5*t+1.2*t.^2-1.2*t.^3;
y3=2+0.6*t+1.2*t.^2-0.8*t.^3;
plot(x0,y0,x1,y1,x2,y2,x3,y3)