Delete before sentence of [sometext] .+sometext -> sometext Delete after sentence of [sometext] sometext.+ -> sometext Matches the element of excluding [sometext] ^((?!sometext).)*$ 12345678 Delete before sentence of [sometext] .+sometext -> sometext Delete after sentence of [sometext] sometext.+ -> sometext Matches the element of excluding [sometext] ^((?!sometext).)*$