15(5x -4)2^(1) -10(5x - 4)

To simplify the given expression, we can use the distributive property and combine like terms.

Step 1: Let's start by simplifying the terms inside the parentheses.
Inside the first set of parentheses, we have 5x - 4, and inside the second set of parentheses, we also have 5x - 4.

Step 2: Apply the distributive property.
Multiplying 15 by 5x gives us 75x.
Multiplying 15 by -4 gives us -60.
So, the first term simplifies to 75x - 60.

Similarly, multiplying -10 by 5x gives us -50x.
Multiplying -10 by -4 gives us 40.
So, the second term simplifies to -50x + 40.

Step 3: Combine like terms.
The simplified expression is obtained by adding or subtracting the terms that have the same variable(s) raised to the same power(s).
The like terms in this case are 75x and -50x.
Combining them, we get 75x - 50x, which simplifies to 25x.
The constants -60 and 40 are also like terms, so we combine them to get -60 + 40, which simplifies to -20.

Therefore, the simplified expression is 25x - 20.