First try

src/main/java/curve/App.java

@@ -15,7 +15,6 @@ public class App {
         Function function = new Function(formula, variable);
         Curve curve = new Curve(function, -5, 10, 1.0);
         drawCurveWithGnuplot(curve);
-        System.out.println(998);
     }
 
     private static void drawCurveWithGnuplot(Curve curve) throws IOException {