Answer:
-1/2
[tex] - \frac{1 }{2} [/tex]
First the two fours cancel out so it's becomes
[tex] \frac{1 - 3}{4} [/tex]
then subtract
[tex] \frac{ - 2}{4} [/tex]
simplify
[tex] \frac{ - 1}{2} [/tex]