A polynomial is added to the second power of 3x - the fourth power of 5x - 2x + 1 to get the second power of 3x-x

A polynomial is added to the second power of 3x - the fourth power of 5x - 2x + 1 to get the second power of 3x-x

3x-x^2-(3x^2-5x^4-2x+1)
=3x-x^2-3x^2+5x^4+2x-1
=5x^4-x^2-3x^2+3x+2x-1
=5x^4-4x^2+5x-1

The difference between the second power + 2x-5 of polynomial 8x and another polynomial is the second power of 5x - the second power + 3 of 2x?

Another polynomial is (8x & # 178; + 2x-5) - (5x & # 178; - 2x & # 178; + 3)
=8x²+2x-5-3x²-3
=5x²+2x-8

The third power of polynomial 2x-2x + X-1 and 3x3-5x + 2mx2 + 3
If the third power of the term 2x - the second power of 8x + X-1 and the third power of 3x3 - 5x + 2mx2 + 3 are added without quadratic term, then M = several times. If the second power of 2x - 8x + X-1 and 3x-5x + 2mx + 3 are added without quadratic term, then M = several times. Note: because the power format can not be typed out, we will take a look at it

m=-4

The waiter cleaned the room and did everything he had to do

It's "due diligence"

A clean room

A clean room

How can we make the room clean
How can we ____ the room____ ?

make ,clean

Keep the room clean and tidy

keep the room clean and tidy.

English translation
1. Entrance and exit of underground parking lot of Jiefang Road square and Shengli Road square
2. 2 main entrances and exits, about 300 parking spaces
3. Convenient, comfortable and safe
4. Drive into the parking lot and get off at XX supermarket

1.Access of the Basement Parking,Jiefanglu Square,Access of the Basement Parking,Shenglilu Square
2.2 main Accesses,over 300 parking place
3.convinient,comfortable,safe
4.Reach XX Supermarket once driving into the parking place

Which phrases do you use when you get on the bus or in the car?
It is helpful for the responder to give an accurate answer

get on/off a bus
get into/out of a car

English translation
Urgent problem (reward plus 10 points)

one unit
on the bus
the way to the park