Target Number #21- Make 254 -

Using the numbers 1, 3, 4, 4, 6, and 7 (in any order), can you write a mathematical expression (e.g. (7*4)*(4+1)-(6/3)) with a result equal to 254?

You may only use the four BASIC math operations (addition, subtraction, multiplication, division) as well as parenthesis. Some additional rules:

1. You are not required to use all six numbers.
2. You may NOT join numbers (e.g. 7 and 6 to make 76).
3. You may only use a number as many times as it appears above.