To demo polar vs Cartesian
"t", "2", "ln(t)", "abs(t)", "a"
"a cos(t)", "a sin(t)", "sqrt(a^2 sin(2 t))", "sqrt(a^2 cos(2 t))",
"a + b sin(t)", "a + b cos(t)", "a sin(n t)", "a cos(n t)",
"3 + cos(8 t)", "1 + 3 cos(5 t)", "1 + 3 sin(t / 3)", "sqrt(t)",
"cbrt(t)", "sin(t) + cos(2t)", "sin(5t)+cos(10t) + 2"}
