I’m sorry I don’t understand the question and the numbers for the first part. Though, for the second part, I hope I can clarify it a little. (I attached the photo below in case it’d help)
First, you need to multiply the negative to 7x and to -3y. Hence -7x+3y (negative times negative is positive).
The second bracket you do the same. 2*3/4, cancel 2 and 4, hence you are left with 3/2x.
2*1/2y = cancel the common factor and you are left with 1y or simply y.
Now the simpler expression looks like this:
-7x+3y+3/2x+y
The last step you gotta combine like terms (x and y)
-7x+3/2x = -11/2x
3y+y=4y
Answer: -11/2x+4y