4(4x+1)-7

To solve the mathematical expression, you can follow these steps:

First, distribute the 4 into the terms inside the parentheses:

4 * 4x + 4 * 1 - 7

Which simplifies to:

16x + 4 - 7

Now, combine the constants (the numbers without x):

16x + (4 - 7)

16x - 3

The simplified expression is:

16x - 3