Simplify ab-a^2+4^2-5ab+3a^2+10

$a b - a^{2} + 4^{2} - 5 a b + 3 a^{2} + 10$

Raise $4$ to the power of $2$ .

$a b - a^{2} + 16 - 5 a b + 3 a^{2} + 10$

Subtract $5 a b$ from $a b$ .

$- 4 a b - a^{2} + 16 + 3 a^{2} + 10$

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

$- 4 a b + 2 a^{2} + 16 + 10$

Add $16$ and $10$ .

$- 4 a b + 2 a^{2} + 26$

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