Priorités: paranthèses > crochets > accolades

Got it ! Calculer pour $x = 3$: $2x$ =   $x-(x+3)]$ =   -$2(1+x)^2 $ =   $1-\{4-[1+(5-x^2)]^2 \} $ =   Calculer pour $x = -2$: $x(x-1)$ =   $2x-[1-(x+3)]$ =   -$\{2[1+(1+x)^2] \} $ =   $1-\{4-[1+(5-x^2)^2]^2 \} $ =