Simplify -(3ab+b^2-5a^2b)+(a^2-5ab+2b^2)-(a^2b-3a^2+b^2)

$- (3 a b + b^{2} - 5 a^{2} b) + (a^{2} - 5 a b + 2 b^{2}) - (a^{2} b - 3 a^{2} + b^{2})$

Remove parentheses.

$- (3 a b + b^{2} - 5 a^{2} b) + a^{2} - 5 a b + 2 b^{2} - (a^{2} b - 3 a^{2} + b^{2})$

Simplify each term.

Apply the distributive property.

$- (3 a b) - b^{2} - (- 5 a^{2} b) + a^{2} - 5 a b + 2 b^{2} - (a^{2} b - 3 a^{2} + b^{2})$

Simplify.

Multiply $3$ by $- 1$ .

$- 3 (a b) - b^{2} - (- 5 a^{2} b) + a^{2} - 5 a b + 2 b^{2} - (a^{2} b - 3 a^{2} + b^{2})$

Multiply $- 5$ by $- 1$ .

$- 3 (a b) - b^{2} + 5 (a^{2} b) + a^{2} - 5 a b + 2 b^{2} - (a^{2} b - 3 a^{2} + b^{2})$

Remove parentheses.

$- 3 a b - b^{2} + 5 a^{2} b + a^{2} - 5 a b + 2 b^{2} - (a^{2} b - 3 a^{2} + b^{2})$

Apply the distributive property.

$- 3 a b - b^{2} + 5 a^{2} b + a^{2} - 5 a b + 2 b^{2} - (a^{2} b) - (- 3 a^{2}) - b^{2}$

Multiply $- 3$ by $- 1$ .

$- 3 a b - b^{2} + 5 a^{2} b + a^{2} - 5 a b + 2 b^{2} - a^{2} b + 3 a^{2} - b^{2}$

Simplify by adding terms.

Subtract $5 a b$ from $- 3 a b$ .

$- b^{2} + 5 a^{2} b + a^{2} - 8 a b + 2 b^{2} - a^{2} b + 3 a^{2} - b^{2}$

Add $- b^{2}$ and $2 b^{2}$ .

$b^{2} + 5 a^{2} b + a^{2} - 8 a b - a^{2} b + 3 a^{2} - b^{2}$

Combine the opposite terms in $b^{2} + 5 a^{2} b + a^{2} - 8 a b - a^{2} b + 3 a^{2} - b^{2}$ .

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

$5 a^{2} b + a^{2} - 8 a b - a^{2} b + 3 a^{2} + 0$

Add $5 a^{2} b + a^{2} - 8 a b - a^{2} b + 3 a^{2}$ and $0$ .

$5 a^{2} b + a^{2} - 8 a b - a^{2} b + 3 a^{2}$

Subtract $a^{2} b$ from $5 a^{2} b$ .

$a^{2} - 8 a b + 4 a^{2} b + 3 a^{2}$

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

$4 a^{2} - 8 a b + 4 a^{2} b$