[tex]2x+3y^2(x-y^2)[/tex]
First use distributive property on the second term ([tex]a(b+c)=ab+ac[/tex]),
[tex]2x+3y^2\cdot x+3y^2\cdot y^2[/tex]
Multiply the same bases of exponents,
[tex]2x+3xy^2+3y^{2+2}[/tex]
And simplify,
[tex]2x+3xy^2+3y^4[/tex]
Hope this helps :)
