#### Answer

-2

#### Work Step by Step

We are given the expression $(-3-4i)-(-1-4i)$. First, we must use the distributive property to simplify the right term.
$(-3-4i)-(-1-4i)=-3-4i+1+4i$
Next, we can group like terms and simplify.
$(-3+1)+(-4+4)i=-2+0i=-2$