Ответ:

1.  (x + 3.2) - (x + 4.5)

2. ((3 * m) / 5) + (5 / (3 * m))
3. ((a ** 2) + (4 * a)) / ((a ** 2) + (8 * a) + 16)

4. (((a - (2 * b)) ** 2) - (4 * (b**2))) / a

5. 4 * ((2 * a) - (3 * b))

6. (x + y) / 2

7. ((x ** 2) - (2 * x * y) + (4 * (y ** 2))) / (x + 5)

8. (2 * (x ** 2)) - (4 * x * y) + (3 * (y ** 2)) + ((x + y) / 7)