Implement equals for EquationsSystem as ordered parameter equality

core/src/main/java/it/cavallium/warppi/math/functions/equations/EquationsSystem.java

@@ -23,6 +23,23 @@ public class EquationsSystem extends FunctionDynamic {
 		super(root, value);
 	}
 
+	@Override
+	public boolean equals(final Object o) {
+		if (o instanceof EquationsSystem) {
+			final FunctionDynamic f = (FunctionDynamic) o;
+			if (functions.length != f.getParametersLength()) {
+				return false;
+			}
+			for (int i = 0; i < functions.length; i++) {
+				if (!functions[i].equals(f.getParameter(i))) {
+					return false;
+				}
+			}
+			return true;
+		}
+		return false;
+	}
+
 	@Override
 	public EquationsSystem clone() {
 		Function[] newFuncs = functions.clone();