\begin{parts}
    \part Développer les expressions suivantes
    \begin{multicols}{2}
        \begin{subparts}
            \Block{set e = Expression.random("_*(_*x + _)")}
            \subpart $A = \Var{e}$
            \begin{solution}
                \begin{eqnarray*}
                    \Var{e.simplify().explain() | calculus(name = "A")}
                \end{eqnarray*}
            \end{solution}

            \Block{set e = Expression.random("(_*x+_)(_*x + _)", val_min = 2)}
            \subpart $B = \Var{e}$
            \begin{solution}
                \begin{eqnarray*}
                    \Var{e.simplify().explain() | calculus(name = "B")}
                \end{eqnarray*}
            \end{solution}

            \columnbreak

            \Block{set e = Expression.random("(_*x + _)^2", val_min = 2)}
            \subpart $C = \Var{e}$
            \begin{solution}
                \begin{eqnarray*}
                    \Var{e.simplify().explain() | calculus(name = "C")}
                \end{eqnarray*}
            \end{solution}

            \Block{set e = Expression.random("(_*x - _)^2", val_min = 2)}
            \subpart $D = \Var{e}$
            \begin{solution}
                \begin{eqnarray*}
                    \Var{e.simplify().explain() | calculus(name = "D")}
                \end{eqnarray*}
            \end{solution}
        \end{subparts}
    \end{multicols}

    \part Factoriser les expressions suivantes
    \begin{multicols}{2}
        \begin{subparts}
            \Block{set e = Expression.random("{a}x*(_*x + _)", conditions = ['{a} >= 2'])}
            \subpart $A = \Var{e.simplify()}$
            \begin{solution}
                \begin{eqnarray*}
                    A = \Var{e.simplify()} = \Var{e}
                \end{eqnarray*}
            \end{solution}

            \Block{set e = Expression.random("_x*(_*x + _)")}
            \subpart $B = \Var{e.simplify()}$
            \begin{solution}
                \begin{eqnarray*}
                    B = \Var{e.simplify()} = \Var{e}
                \end{eqnarray*}
            \end{solution}

            \columnbreak

            \Block{set e = Expression.random("_x*(_*x + _)")}
            \subpart $C = \Var{e.simplify()}$
            \begin{solution}
                \begin{eqnarray*}
                    C = \Var{e.simplify()} = \Var{e}
                \end{eqnarray*}
            \end{solution}

            \Block{set e = Expression.random("(_*x + _)^2", val_min=2, val_max = 10)}
            \subpart $D = \Var{e.simplify()}$
            \begin{solution}
                \begin{eqnarray*}
                    D = \Var{e.simplify()} = \Var{e}
                \end{eqnarray*}
            \end{solution}
        \end{subparts}
    \end{multicols}

\end{parts}