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           ☆1 arithmetic calculations

[1/1 Formula]
    Work: Calculate the value of equation A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,8)+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3)) .
    Question type: Mathematical calculation
    Solution:
          A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,8)+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+A(9,5)+A(9,6)+A(9,7)+A(9,8)+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+A(9,6)+A(9,7)+A(9,8)+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+A(9,7)+A(9,8)+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+181440+A(9,8)+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+181440+362880+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+181440+362880+362880-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+181440+362880+362880-16*(3024+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+181440+362880+362880-16*(3024+15120+A(9,6)+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+181440+362880+362880-16*(3024+15120+60480+A(9,7)+A(9,2)+A(9,3))
        =3024+15120+60480+181440+362880+362880-16*(3024+15120+60480+181440+A(9,2)+A(9,3))
        =3024+15120+60480+181440+362880+362880-16*(3024+15120+60480+181440+72+A(9,3))
        =3024+15120+60480+181440+362880+362880-16*(3024+15120+60480+181440+72+504)
        =3024+15120+60480+181440+362880+362880-16*260640
        =3024+15120+60480+181440+362880+362880-4170240
        =18144+60480+181440+362880+362880-4170240
        =78624+181440+362880+362880-4170240
        =260064+362880+362880-4170240
        =622944+362880-4170240
        =985824-4170240
        =-3184416

    Answer:A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,8)+A(9,9)-16*(A(9,4)+A(9,5)+A(9,6)+A(9,7)+A(9,2)+A(9,3))=-3184416


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