[KIM NAMJOON FANFICTION | MY BOYFRIEND SERIES 5 ] sqrt(cos(x))*cos(300x)+sqrt(abs(x))-0.7)*(4-x*x)^0.01,sqrt(6-x^2),-sqrt(6-x^2) from -4.5 to 4.5 "I challenge you to solve that graphic function and you gonna realize loving someone isn't that easy as you think," he said. Raenissa, 2019