Simplify (3x^2+2y-3)+(2x^2-x+3y)

$(3 x^{2} + 2 y - 3) + (2 x^{2} - x + 3 y)$

Remove parentheses.

$3 x^{2} + 2 y - 3 + 2 x^{2} - x + 3 y$

Add $3 x^{2}$ and $2 x^{2}$ .

$5 x^{2} + 2 y - 3 - x + 3 y$

Add $2 y$ and $3 y$ .

$5 x^{2} + 5 y - 3 - x$

Move $- 3$ .

$5 x^{2} + 5 y - x - 3$