\(P=\left(\dfrac{4x\left(2-x\right)}{\left(2+x\right)\left(2-x\right)}+\dfrac{8x^2}{\left(2+x\right)\left(2-x\right)}\right):\left(\dfrac{x-1}{x\left(x-2\right)}-\dfrac{2\left(x-2\right)}{x\left(x-2\right)}\right)\)
\(=\left(\dfrac{4x\left(x+2\right)}{\left(x+2\right)\left(2-x\right)}\right):\left(\dfrac{3-x}{x\left(x-2\right)}\right)=\dfrac{4x}{\left(2-x\right)}.\dfrac{x\left(2-x\right)}{x-3}\)
\(=\dfrac{4x^2}{x-3}\)