( -3 ) . ( 2 - 120 ) - 120 . 3

To simplify the expression, we can use the order of operations (PEMDAS) which states that we should perform any calculations inside parentheses first, then any multiplication or division from left to right, and finally any addition or subtraction from left to right.

Let's simplify the expression step by step:

(-3) * (2 - 120) - 120 * 3

First, let's simplify the expression inside the first set of parentheses:

(-3) * (-118) - 120 * 3

Next, let's perform the multiplication:

354 - 120 * 3

Now, let's perform the multiplication inside the second set of parentheses:

354 - 360

Finally, let's perform the subtraction:

-6

Therefore, (-3) * (2 - 120) - 120 * 3 equals -6.