hãy làm ra đáp án đúng

`@`Gui tus

`1)` `(2x)/5 + 2/5`

`= (2x + 2)/5`

`= (2x +2)/5`

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`2)` `(2x + 5)/3 + (x - 2)/3`

`= ((2x + 5) + (x - 2))/3`

`= (2x + 5 + x - 2)/3`

`= (3x +3)/3`

`= (3(x+1))/3`

`= x +1`

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`4)` `(x^2 + 4)/x - (3x + 4)/x`

`= ((x^2 + 4) - (3x + 4))/x`

`= (x^2 + 4 - 3x - 4)/x`

`= (x^2 - 3x)/x`

`= (x(x - 3))/x`

`= x -3`

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`5)` `( 5x + y^2)/(x^2y) - (5y - x^2)/(x^2y)`

`= (( 5x + y^2) - (5y - x^2))/(x^2y)`

`= ( 5x + y^2 - 5y - x^2)/(x^2y)`