Find the value of the variable y, for which:
the sum of the fractions 3y+9/3y−1 and 2y−13/2y+5 is 2.
the difference between the fractions 5y+13/5y+4 and 4−6y/3y−1 is 3.
the sum of the fractions y+1/y−5 and 10/y+5 is equal to their product.
the difference between the fractions 6/y−4 and y/y+2 is equal to their product.

please show work if possible