User's Manual

Page E-2

Step A1 Step A2

Step A3 Step A4

Step A5 Step A6

We notice the application of the hierarchy-of-operation rules in this selection.

First the y (Step A1). Then, y-3 (Step A2, parentheses). Then, (y-3)x (Step A3,

multiplication). Then (y-3)x+5, (Step A4, addition). Then, ((y-3)x+5)(x

+4)

(Step A5, multiplication), and finally, ((y-3)x+5)(x

+4)/SIN(4x-2) (Step A6,

division). It is important to point out that the multiplication in Step A5 includes

the first term, ((y-3)x+5) with a second term (x

+4), which is already

calculated. To see the steps in calculating these second term, press the down

arrow key ˜, continuously, until the clear, editing cursor is triggered around

the y, once more. Then, press the right arrow key until these cursor is over the

x in the second term in the numerator. Then, press the upper-arrow key to

select this x. The steps in the evaluation of the expression, starting from this

point, are shown below: