Simplify (2x-11x^2+14)+(7x^2-x+3)

$(2 x - 11 x^{2} + 14) + (7 x^{2} - x + 3)$

Remove parentheses.

$2 x - 11 x^{2} + 14 + 7 x^{2} - x + 3$

Subtract $x$ from $2 x$ .

$- 11 x^{2} + 14 + 7 x^{2} + x + 3$

Add $- 11 x^{2}$ and $7 x^{2}$ .

$- 4 x^{2} + 14 + x + 3$

Add $14$ and $3$ .

$- 4 x^{2} + x + 17$