(2^0+2^1+2^2+2^3+2^4+2^5)*（20^3）+17^2]*(25^2-520）/7
1+2+3+……+3600+1*2*3*4*5*6*7*8*9*10-2546265 =6481800+3628800-2546265 =7564335
8000000-435665=7564335
5+30+300+4000+60000+500000+7000000＝7564335
