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To evaluate an expression or execute a command in a notebook,
press **Enter**:

3*2^10 + 1/3 - 3

The results appear in the same grey bracket below the input data. By default, the commands and calculations you type appear in red color, the results appear in blue.

To suppress the output of a command, terminate a command with
a colon. This allows you to hide irrelevant intermediate results.
For example, assign the factorial of 123 to the variable `a`,
and the factorial of 132 to the variable `b`. In MuPAD^{®},
the assignment operator is `:=` (the equivalent function is `_assign`).
The factorial operator is `!` (the equivalent function is `fact`). Terminate these
assignments with colons to suppress the outputs. Here MuPAD displays
only the result of the division `a/b`:

a := 123!: b := 132!: a/b

delete a, b:

You can enter several commands in an input region separating them by semicolons or colons:

a+b; a*b; a^b

To start a new line in an input region, press **Ctrl**+**Enter** or **Shift**+**Enter**.

If you have several input regions, you can go back to previous calculations and edit and reevaluate them. If you have a sequence of calculations in several input regions, the changes in one region do not automatically propagate throughout other regions. For example, suppose you have the following calculation sequence:

y := exp(2*x)

z := x + y

If you change the value of the variable `y`,
the change does not automatically apply to the variable `z`.
To propagate the change throughout different input regions, select **Notebook** from the main menu. From here you
can:

Select

**Evaluate**to evaluate calculations in one input region.Select

**Evaluate From Beginning**to evaluate calculations in the input regions from the beginning of a notebook to the cursor position.Select

**Evaluate To End**to evaluate calculations in the input regions from the cursor position to the end of a notebook.Select

**Evaluate All**to evaluate calculations in all input regions in a notebook.

Also, you can propagate the change throughout multiple input
regions by pressing **Enter** in each
input region.

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