F x tg x

F x tg xF x tg xF x tg xF x tg xF x tg xF x tg x
F x tg xF x tg xF x tg xF x tg xF x tg xF x tg x
F x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg xF x tg x