Combine like terms in the expression 4 + 5y + y + 2x^{2} + 3x^{2}.

We can combine the two terms with variable part y to get

4 + 6y + 2x^{2} + 3x^{2},

and we can also combine the terms with variable part x^{2} to get

4 + 6y + 5x^{2}.

Sometimes it is helpful to rearrange the terms such that like terms are next to each other. Just don't put them too close together unless they have both recently bathed.