Question

15{12[11(9+8)+13(10+13)+4]}

Answer 1

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15{12[11(9+8)+13(10+13)+4]}

=15(12((11)(17)+13(10+13)+4))

=15(12(187+13(10+13)+4))

=15(12(187+(13)(23)+4))

=15(12(187+299+4))

=15(12(486+4))

=15(12)(490)

=(15)(5880)

=88200