The religious references may optionally be omitted. If there is no ambiguity then parentheses may be omitted. However, some parentheses can be omitted according to certain rules. The verb may also be omitted in some sentences. He therefore omitted parts, and sometimes added to it. This apostrophe, however, is often omitted. Such spaces should be omitted, however, according to the Associated Press. In some cases, however, these markings were simply omitted. He notes that some steps may be omitted. Thus, this blessing is usually omitted or simply read by the hazzan. In shorthand however, they are usually omitted. In particular, documentation files are normally omitted. Additionally there are omitted and added digits. When the numerator is one, it may be omitted. In some instances, the fluting has been omitted.