5x+4. 4x+14. 6x-3

To add these expressions, you simply combine the like terms.

Given expressions:
1. 5x + 4
2. 4x + 14
3. 6x - 3

To add these expressions, you add the coefficients of the like terms:

1. (5x + 4) + (4x + 14) + (6x - 3) = 5x + 4x + 6x + 4 + 14 - 3

Combining like terms:
= (5 + 4 + 6)x + (4 + 14 - 3)
= 15x + 15

So, the sum of 5x + 4, 4x + 14, and 6x - 3 is 15x + 15.