Solve |1/(x+2)(x-1)+(x^2-1)

$$| \frac { 1 } { ( x + 2 ) ( x - 1 ) } + ( x ^ { 2 } - 1 )$$

Evaluate

$$\frac{|x^{4}+x^{3}-3x^{2}-x+3|}{|x-1||x+2|}$$

Differentiate w.r.t. x

$$\frac{4sign(x^{4}+x^{3}-3x^{2}-x+3)x^{5}+7x^{4}sign(x^{4}+x^{3}-3x^{2}-x+3)-11x^{3}sign(x^{4}+x^{3}-3x^{2}-x+3)-13x^{2}sign(x^{4}+x^{3}-3x^{2}-x+3)+11xsign(x^{4}+x^{3}-3x^{2}-x+3)-2x|x^{4}+x^{3}-3x^{2}-x+3|+2sign(x^{4}+x^{3}-3x^{2}-x+3)-|x^{4}+x^{3}-3x^{2}-x+3|}{\left(x-1\right)|x-1|\left(x+2\right)|x+2|}$$