Function: f(x) = 2xsin(πx) domain=(-∞, ∞)
You don't have to type the domain=(-∞, ∞). The graphing calculator appends it automatically when you click Graph. You can then change the end points.
Equation: 3x^2y^3 = 2ysin(πx)
When graphing equations, the domain is applicable only when the polar coordinate system is used. In that case, the domain refers to the values of θ (because every point has infinitely many polar representations you need to specify the domain for angles θ). The graphing calculator then draws the graph over the specified interval of angles.
Parametric Curve: p(t) = (5cos(t), 4sin(t)) domain=(0, 2π)
The default domain for Parametric Curves is (0, 2π). The graphing calculator appends it automatically when you click Graph. You can then change the end points. This graphing calculator lets you animate Parametric Curves to visualize how their graphs are constructed.
Points: pts: 1,2; 3,4; 5,6;  i.e, type in the point (x,y) as x,y;.
Curve Fitting: When you entered points, the graphing calculator lets you connect the points with line segments, or to calculate and graph the polynomial function of the least degree passing through the given set of points or the least-squares line that best fits the points according to the Gauss' least-squares criterion. To do so, simply click Connect, P(x) or L(x), respectively (these buttons appear when entering points).
You can use all algebraic (i.e., linear, quadratic, polynomial, rational functions, etc), power functions, exponential, logarithmic, trigonometric, hyperbolic and their inverses in your expressions:
sin, cos, tan, cot, sec, csc, asin, acos, atan, acot, asec, acsc, sinh, cosh, tanh, coth, sech, csch, asinh, acosh, atanh, acoth, asech, acsch, exp, ln, log, log2, Γ, ceil, round, floor.
Note: asin(x) stands for arc sin(x) or inverse of sin(x). Similarly, asinh(x) stands for inverse of sinh(x).