Void means that something has no legal force. In other words is is not able to be used. For example, a void check. With a void check you cannot legal take money.
If you mean the quotient of m divided by 7, then it should be m/7, because it is in its most simplified form.
A plural noun indicates that there is more than one of that noun (while a singular noun indicates that there is just one of the noun). ... Regular plurals follow this rule (and other similar rules), but irregular plurals are, well, not regular and don't follow a “standard” rule.
<span>A stanza is a group of lines within a poem. Like lines, there is no set length to a stanza; however, there are names to stanzas of certain length. If you have two line stanzas, they are called couplets. And if you extend another sentence to it making 3 stanzas, they are now called the targets. Four lines stanzas are called quatrains and so on. So, this will be the effect created by extending a sentence into the next line or stanza. Poets fit the sentences to show unity in its visual and aural effect.</span>