\(\sf-4R-2r+5\) is already in simplest form.
But if you meant to say \(\sf-4r-2r+5\), we would combine the first two terms.
Adding/subtracting like terms is the same as adding/subtracting whole numbers.
\(\sf-4-2=-6\)
Therefore:
\(\sf-4r-2r=-6r\)
Which gives us:
\(\boxed{\sf-6r+5}\)
