From Group A
x := cos(7*t)*sin(t) y: = cos(-3*t)*cos(t)
From Group B
x := cos(t)*sin(2*t) y: = cos(4*t)*sin(t)
From Group D
x := t*sin(t) y: = t^2 - t^(1/3)

x := 2*t y: = exp(-t)*cos(t) + t*cos(t)

x := sin(t)*cos(t) + sin(2*t)*cos(2*t) + sin(3*t)*cos(3*t) + sin(4*t)*cos(4*t);
y := sin(t)*cos(2*t) + sin(3*t)*cos(4*t) + sin(5*t)*cos(6*t) + sin(7*t)*cos(8*t);

From Group E
x := 1*t+1*cos(t)+.8*cos(.2*t)+0.2*cos(t)
y := 1+sin(t)+0.8*sin(.2*t)+.2*sin(t)

x := 0.5*sin(3*t)*sin(t/2) y := 3*cos(7*t)*sin(t)
From Group F
x := 10*cos(3*t) y: = sin(5*t)

plot3d(sin(2*x) + y^3), x=-1..1, y=-1..9)

From Group G
plot([sin(t*2)+cos(t*3),sin(t)-cos(t^2),t=0..2*Pi],numpoints=100);

From Group H
plot(sin(x^(ln(4*x))), x=0..Pi);

From Group I
plot([37*sin(15*t), 89*cos(20*t), t=0..100]);
