void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
int n = 3;
int batas = 10;
int hasil;
for (int i = 1;i <= batas; i++){
  if(i % 2 == 0){
    hasil = hasil +(n * i);
    Serial.print("(");
    Serial.print(n);
    Serial.print("x");
    Serial.print(i);
    Serial.print(")");
  } else {
    hasil = hasil + (n + i);
    Serial.print("(");
    Serial.print(n);
    Serial.print("+");
    Serial.print(i);
    Serial.print(")");
  }if (i == batas){
    Serial.print("=");
  } else{
    Serial.print("+");
  }}
  Serial.println(hasil);
}


void loop() {
  // put your main code here, to run repeatedly:

}