Fixed a small mistake in parenthesis remover where s was used instead of new_s
Fixed a small mistake in parenthesis remover where s was used instead of new_s

MathGen/oppgavegenerator,MathGen/oppgavegenerator,w0pke/oppgavegenerator,w0pke/oppgavegenerator,MathGen/oppgavegenerator,w0pke/oppgavegenerator