Curve 1

Curve 2

a = CurveCartesian((16 * sin(t)^(3)), (13 * cos(t)) - (5 * cos((2 * t))) - (2 * cos((3 * t))) - cos((4 * t)), t, 0, (2 * π))
b = CurveCartesian((((8 * sin(t)) * cos(t)) * log(abs(t))), ((8 * abs(t)^(0.3)) * cos(t)^(1 / 2)), t, -1, 1)
c = true
d = true