2-22-23……-217-218-219+220
=2-22-23……-217-218+219(2-1)
=2-22-23……-217+218(2-1)
=2-22-23……+217(2-1)
=2-22+23(2-1)
=2+22(2-1)
=2+4
=6
乘方的指数这里不支持,请注意区分
2-22-23……-217-218-219+220
=2-22-23……-217-218+219(2-1)
=2-22-23……-217+218(2-1)
=2-22-23……+217(2-1)
=2-22+23(2-1)
=2+22(2-1)
=2+4
=6
乘方的指数这里不支持,请注意区分