Question 394547
According to the order of opeations, you must do the operations in the parenthesis first.  In the parentheses, you multiply 43 by 2.

{{{-3+18x^2-(40+86)}}}

Then, you add 86 to 40 and you get 126.

{{{-3+18x^2-(126)}}}

Remove the parentheses.  

{{{-3x+18x^2-126}}}

Now, subtract 126 from -3 and you'll get {{{-129+18x^2}}}

Answer: {{{-129+18x^2}}}


- Eric L :)