Editing Operand (section)

===Infix and the order of operation===
{{main|Order of operations}}

In a mathematical expression, the order of operation is carried out from left to right. Start with the leftmost value and seek the first operation to be carried out in accordance with the order specified above (i.e., start with parentheses and end with the addition/subtraction group). For example, in the expression

:<math>4 \times 2^2 - (2 + 2^2)</math>,

the first operation to be acted upon is any and all expressions found inside a parenthesis. So beginning at the left and moving to the right, find the first (and in this case, the only) parenthesis, that is, (2&nbsp;+&nbsp;2<sup>2</sup>). Within the parenthesis itself is found the expression 2<sup>2</sup>. The reader is required to find the value of 2<sup>2</sup> before going any further. The value of 2<sup>2</sup> is 4. Having found this value, the remaining expression looks like this:

:<math>4 \times 2^2 - (2 + 4)</math>

The next step is to calculate the value of expression inside the parenthesis itself, that is, (2&nbsp;+&nbsp;4)&nbsp;=&nbsp;6. Our expression now looks like this:

:<math>4 \times 2^2 - 6</math>

Having calculated the parenthetical part of the expression, we start over again beginning with the left most value and move right. The next order of operation (according to the rules) is exponents. Start at the left most value, that is, 4, and scan your eyes to the right and search for the first exponent you come across. The first (and only) expression we come across that is expressed with an exponent is 2<sup>2</sup>.  We find the value of 2<sup>2</sup>, which is 4. What we have left is the expression

:<math>4 \times 4 - 6</math>.

The next order of operation is multiplication. 4&nbsp;×&nbsp;4 is 16. Now our expression looks like this:

:<math>16 - 6</math>

The next order of operation according to the rules is division. However, there is no division operator sign (÷) in the expression, 16&nbsp;−&nbsp;6. So we move on to the next order of operation, i.e., addition and subtraction, which have the same precedence and are done left to right.

:<math>16 - 6 = 10</math>.

So the correct value for our original expression, 4&nbsp;×&nbsp;2<sup>2</sup>&nbsp;−&nbsp;(2&nbsp;+&nbsp;2<sup>2</sup>), is 10.

It is important to carry out the order of operation in accordance with rules set by convention. If the reader evaluates an expression but does not follow the correct order of operation, the reader will come forth with a different value. The different value will be the incorrect value because the order of operation was not followed. The reader will arrive at the correct value for the expression if and only if each operation is carried out in the proper order.