{
    /(b_mul)
        (bA)(bB)
            /(zqA)(lbA)(hb!A)
                /
                    /(zqB)(lbB)(hb!B)
                        /
                            /
                                /
                                    /
                                        /[b0]/[hb!A] <[lbB]>
                                    /
                                        /[b0]/[hb!B] <[lbA]>
                                    [b_add]
                                /
                                    /
                                        /
                                            [hb!A]
                                        /
                                            [hb!B]
                                        [b_mul]
                                    [b_double]
                                [b_add]
                            /
                                </[lbB]/[lbA][and]>
                            [b!]
                        /
                            [b0]
                        [zqB]
                    [bB]
                /
                    [b0]
                [zqA]
            [bA]
    [YC]
|
    b_mul
}

{ (b) /[b]/[b][b_mul] | b_square }