(1)7L2M8p4p4x)p0P减去15得27。1E6A9O1F:R
(2);L/`;L*x3~(R:{8J(Z)c)s3P比58小19。1E6A9O1F:R
(3)3l/X'r9T)D(?0N0F.V*M*^加上18得37。1E6A9O1F:R
(4)90比0N5Y'W,A大25。1E6A9O1F:R