MMMMMMMMMMM <#7984#>- <#7984#> negate integer value
<#7985#>! <#7985#> logical not
<#7986#>;SPMquot; <#7986#> return integer as string
<#7987#>. <#7987#> return string as integer
Bug: <#7989#>.<#7989#> and <#7990#>;SPMquot;<#7990#> don't know about negative integers!