F.1 math questions

plz help me to answer the quwstion!If you do not know the answer,lz answer no!Thx!

1.Simplify the following ratios:
(a) 1m cube:6000cm cube


2.The lengths of the sides of a triangle are in the ratio 2:4:5.
(a)If the shortest side is 8 cm long,find the lengths of the other sides.
(b)If their total length is 66cm,Find the length of each side.


3.Simplify:
(a) (-8)^4
(b) (-2)^2-(5)^3

4.Complete the following:
(a) 14a-3b+5a+2b
(b) 2y+14z-6y-18z

5.Expand:
(a) 2x(1+x^2)