please help. it’s 7th grade math. (mathematics)))

Answer:
4. answer is -48xy
5. answer is 1
Step-by-step explanation:
4. -3/4*-8y*4/3*6x*-1
=6y*4/3*6x*-1
=8x*6x*-1
-48xy
5.
-13.6/x=-13.6/1
If the numerators are the same, the denominators have to too.