Hej Matematik (literally "Hi Mathematics" and also the title of a Danish primary school math book) is a Danish pop band, consisting of the Aqua-member Søren Rasted and his nephew Nicolaj Rasted. On live shows, they are accompanied by Nikolaj Teinvig on guitar, Nicholas Findsen on bass, Mads Storm on keyboards and Peter Düring on drums. 　　Now singned at Sony, Hej Matematik released the first single from their upcoming release, called "Ik ordinær", in 2014. The song features guest vocals from the Danish band D-A-D's lead singer Jesper Binzer. In 2015, the singles "Cykler uden hænder" and "København", an Ulige Numre cover version, followed, along with the groups' second extended play, titled Selvfed. None of these album and single releases did chart. Søren and Nicolaj made a guest appearance in the Danish comedy show Ditte & Louise as themselves.