Respuesta :

The first one is 2x-3y/2
The second one is 1/x+2
The third one is (2x-5y)/(2x+5y)
The fourth one is x^2/z^2

The first one is 2x-3y/2

The second one is 1/x+2

The third one is (2x-5y)/(2x+5y)

The fourth one is x^2/z^2