Question

Simplify: (5−23+2−7)−(25+74−43+2)

Answer 1

From the given expression we get:

$(x^5-2x^3+x^2-7)-(2x^5+7x^4-4x^3+2)=x^5-2x^3+x^2-7-2x^5-7x^4+4x^3-2$

Associating similar terms we get:

$\begin{gathered} (x^5-2x^5_{})+(-2x^3+4x^3)+(x^2)+(-7-2) \\ =-x^5+2x^3+x^2-9 \end{gathered}$