Simplify 1/3(3x) + [(-5x) + (5x)]

1/3 * 3 = 1 so the first portion becomes x

-5x + 5x = 0 so the second portion dissapears

you are left with:

x

I'll do the second one aswell

Simplify and write with positive exponents

xy^5

_____

x^3y

this can be wrtten as ..x ... y^5

.............................----.*.----

.............................x^3.....y

The forst portion can ber written as 1/x^2 and the second potio as y^4/1

multiply the two parts together and you get

y^4

___

x^2