Type the expression of the function[br]Adjust the graphics area properly with xmin, ymin, xmax, ymax[br]Give the lower and upper bounds for integral (You can also move them directly along the x-axis)[br]Give the number of subintervals or slide it. You can also change the limits of the slider.[br]Define the position of calculation point on subinterval (0 (left) to 1 (right))