Is this correct with addition and simplified.

Question

(5x^2-7x+23)+2x^2+9x-72)=7x^2-7x+9x+23-72=7x^2+2x+49

Answer 1

( 5 x ^ 2 - 7 x + 23 ) + 2 x ^ 2 + 9 x -72 =

5 x ^ 2 + 2 x ^ 2 - 7 x + 9 x + 23 - 72 =

7 x ^ 2 + 2 x - 49