php - I need a regular expression to my htaccess -

i'm new regular expression , need redirecting on .htacess urls

some examples are:

/lentes-de-contato/9/lentes-de-contato-biofinity-coopervision /lentes-de-contato/9/lentes-de-contato-biofinity-teste /lentes-de-contato/9/lentes-de-contato-biofinity /lentes-de-contato/9/biofinity 

the regex needs match word biofinity don't match word coopervision. tried several ways build expression looks this: "biofinity" , !"coopervision" nothing seems work. till have:

/lentes-de-contato/([0-9]+)/(.*biofinity.*) 

could me?

maybe, so. rewrterule achieved condition

rewritecond %{request_uri} biofinity rewritecond %{request_uri} !coopervision rewriterule