270-3+653-(10-5)•2+642258964-12345841= 270-3+653-5•2+642258964-12345841= 270-3+653-10+642258964-12345841= 920-13+642258964-12345841= 907+629913123= 629914030
Therefore, the answer is 629914030.
270-3+653-(10-5)•2+642258964-12345841
= 270-3+653-5•2+642258964-12345841
= 270-3+653-10+642258964-12345841
= 920-13+642258964-12345841
= 907+629913123
= 629914030
Therefore, the answer is 629914030.