Given x2 – [3x + [2x – (x2 – 1)] + 2]
First we have to remove the parentheses, then remove braces, and then the square brackets.
Then we get,
= x2 – [3x + [2x – (x2 – 1)] + 2]
= x2 – [3x + [2x – x2 + 1] + 2]
= x2 – [3x + 2x – x2 + 1 + 2]
= x2 – [5x – x2 + 3]
On simplifying we get
= x2 – 5x + x2 – 3
= 2x2 – 5x – 3