all i need is the division. PLEASE DO NOT SIMPLIFY ALL THE WAY!

example: (4x^2+2x)/2x = 2x+1

so

2. (4ab-2b) / -2b

3. (12rst-6rs^2t) / 3rs

4. 4y^3 - 2y^2 + 6y / (-2y)

5. (-18r^5t^2 + 12r^3t + 3rt) / 6rt

6. (21k^6l^4 + 14k^3l^3 - 7k^2l^2) / 7kl

please show work/explain so that i may learn!!! thankyou!!!