1 What would you do if the lift (get) ………………… stuck between two floors?
2 If you (paint) …………………the walls white the room would be much brighter. 
3 If you (change) …………… your job would it affect your pension? 
4 If you knew you had only six weeks to live how you (spend) ………………… those six weeks? 
5 You wouldn't have so much trouble with your car if you (have) ………………… it serviced regularly. 
6 I'd climb over the wall if there (not be) …………………so much broken glass on it

1 If he (clean) ……………… his windscreen he'd be able to see where he was going. 
2 If you drove your car into the river, you (be able) …….. to get out?
3 If you (not belong) ………………to a union, you couldn't get a job. 
4 If I (win…………………) a big prize in a lottery, I'd give up my job. 
5 What ………you (do)……… if you found a burglar in your house? 
6 I could tell you what this means if I (know) …………………Greek. 

A= -5x²y⁴.(3x²y³-2x³y²-xy)

B= x²y.(2xy+x²-xy²)-2xy².(x²-x³y+3)

A= 4x³y².(-2x²y+y-3x²y³)

B= -4x²y³.(2x-3y)-2xy.(-4x²y²-4xy³)