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
2
+4)
(Step A5, multiplication), and finally, ((y-3)x+5)(x
2
+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
2
+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:
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