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(103)+(113)+(123)+(133)+(143)+(153)+(163)+(173)+(183)+(193)+(203){10\choose3} + {11\choose3} + {12\choose3} + {13\choose3} + {14\choose3} + {15\choose3} + {16\choose3} + {17\choose3} + {18\choose3} + {19\choose3} + {20\choose3}(310)+(311)+(312)+(313)+(314)+(315)+(316)+(317)+(318)+(319)+(320) Calculate the above sum.
This is part of the set My Problems and THRILLER
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