a)\(f\left(x\right)=x^3-3x^2+x-5\)
\(g\left(x\right)=-x^3+3x^2+3x-5\)
b)\(f\left(x\right)+g\left(x\right)=x^3-3x^2+x-5-x^3+3x^2+3x-5\)
\(f\left(x\right)+g\left(x\right)=4x-10\)
\(f\left(x\right)-g\left(x\right)=x^3-3x^2+x-5+x^3-3x^2-3x+5\)
\(f\left(x\right)-g\left(x\right)=2x^3-6x^2-2x\)




