Simplify m^2-3n^2-m^2n-2mn^2+3n^2-2m^2

$m^{2} - 3 n^{2} - m^{2} n - 2 m n^{2} + 3 n^{2} - 2 m^{2}$

Step 1

Combine the opposite terms in $m^{2} - 3 n^{2} - m^{2} n - 2 m n^{2} + 3 n^{2} - 2 m^{2}$ .

Add $- 3 n^{2}$ and $3 n^{2}$ .

$m^{2} - m^{2} n - 2 m n^{2} + 0 - 2 m^{2}$

Add $m^{2} - m^{2} n - 2 m n^{2}$ and $0$ .

$m^{2} - m^{2} n - 2 m n^{2} - 2 m^{2}$

Step 2

Subtract $2 m^{2}$ from $m^{2}$ .

$- m^{2} - m^{2} n - 2 m n^{2}$