이별 = (눈물+슬픔)^2/(술×담배연기)^4-(사랑+약속+추억)+(미움+물거품+잿빛하늘)+sin무관심+cos무표정+(술+방황+증오)-키스×(포옹^3+순결^3)+(고민^2×어둠^2)(기차^3×바다^3)+(커피숍×락카페)/깡소주×포장마차)^1g-(sin^2이해×1/tan^2오해-(sin^4용서×1/cot^4분노)+(질투)^2+4/3(욕심)^3×변심^x+고무신^y-(우산x^3+비x^2+바람x+진실)×(전화y^3+삐삐y^2+속삭임y+울음)+종이학×(한숨+기다림)-(오뉴월서리발^2×모래성^2)(고독×슬픔)+기다림×사람+(기다림+낙서+흔적+향기×(숨결+그리움+추억)+(미소^2×표정^2)(강변×그리움+추억)+(미소^2×표정^2)(강변×무지개)+천일동안-방황×1818+(세상)^2+4/3(사랑)^3+(이해×용서)