simlify the following expersion and wrtite the answer with positive exponents 6*y^10-(3*y^6)+((8*y^4)/3y^2

6*y^10-(3*y^6)+((8*y^4)/3y^2

You brackets are not quite right but I think that this is what you mean :)

$$\\6*y^{10}-(3*y^6)+((8*y^4)/(3y^2))\\\\ 6y^{10}-3y^6+\frac{8y^4}{3y^2}\\\\ 6y^{10}-3y^6+\frac{8y^2}{3}\\\\$$

This cannot be simplified any further.