Simplify (6m^2n^2-11m^2n^4)+(-9m^2n^2-m^3n^3-10m^2)+(-10m^2n^4-5m^2n^2)

$(6 m^{2} n^{2} - 11 m^{2} n^{4}) + (- 9 m^{2} n^{2} - m^{3} n^{3} - 10 m^{2}) + (- 10 m^{2} n^{4} - 5 m^{2} n^{2})$

Remove parentheses.

$6 m^{2} n^{2} - 11 m^{2} n^{4} - 9 m^{2} n^{2} - m^{3} n^{3} - 10 m^{2} - 10 m^{2} n^{4} - 5 m^{2} n^{2}$

Subtract $9 m^{2} n^{2}$ from $6 m^{2} n^{2}$ .

$- 3 m^{2} n^{2} - 11 m^{2} n^{4} - m^{3} n^{3} - 10 m^{2} - 10 m^{2} n^{4} - 5 m^{2} n^{2}$

Subtract $5 m^{2} n^{2}$ from $- 3 m^{2} n^{2}$ .

$- 11 m^{2} n^{4} - m^{3} n^{3} - 10 m^{2} - 10 m^{2} n^{4} - 8 m^{2} n^{2}$

Subtract $10 m^{2} n^{4}$ from $- 11 m^{2} n^{4}$ .

$- m^{3} n^{3} - 10 m^{2} - 21 m^{2} n^{4} - 8 m^{2} n^{2}$

Move $- 10 m^{2}$ .

$- m^{3} n^{3} - 21 m^{2} n^{4} - 8 m^{2} n^{2} - 10 m^{2}$