Answer:
(1/4)w - 1
Step-by-step explanation:
I think you meant, "Subtract (1/4)w + 4 from (1/2)w + 3."
Write (1/2)w + 3 first, with (1/4)w + 4 on the next line; then subtract:
(1/2)w + 3
-[(1/4)w + 4]
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(1/4)w - 1 (answer)