ka tolong bantuin aku besok dinilai

1. (x + 1)(x + 4) / (x + 4) 
= x + 1

2. (3x + 1)(x + 3) / (x + 3)
= 3x + 1

3. (2x - 3)(x + 4) / (x + 4)
= 2x - 3

4. (x - 6)(x + 4) / (x + 4)
= x - 6

5. 6 p^-7 q^11 / 7

6. 4 m^-3 n^-7 / 3 r

7. 2 x^3 y^2 z^-2