Calculation: 13 + 16 + 110 + 115 + 121 + 128 + 136 + 145=______ ．

13+16+110+115+121+128+136+145，=22×3+23×4+24×5+… +29×10，=2[(12−13)+(13−14)+(14−15)+… +(19 − 110)], = 2 (12 − 110), = 45

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