Im assuming you want to simplify.
6(5w-2x)-(4w-x)
Multiply first bracket by 6.
30w-12x-4w+x
26w-11x.
Note.-(4w-x) is turned into -4w+x when brackets are removed because it is the same as +(-1(4w-x)), so multiplying the -x by -1 turns it into +x or just x.
