Can someone do 1& 3 and show me?

1.)lets simply simplify step by step
6x^5-27x^3
there are no like terms
so thats ur answer :6x^5-27x^3

3.)=3m^3-12m^2+2/m^2

hope this helps!

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.