#### Answer

$7+4i$

#### Work Step by Step

When adding/subtracting complex numbers, we add/subtract the real parts, and add/subtract the imaginary parts.
Step 1: $w-z$
Step 2: $(3+5i)-(-4+i)$
Step 3: $3+5i+4-i$
Step 4: $3+4+5i-i$
Step 5: $7+4i$
The answer is in rectangular form.