Plus the integral from zero to one of f of x, f of x, d x. And the reason why I broke it up like this is because this function has a different definition or it takes, it's a different, it's piecewise defined. It's different when we're less than or equal to zero versus when we are greater than zero. So that's why I like to break it up this way. So then we get this is equal to one half times, and in brackets, in big brackets like this, this first part right over here, we can write as the integral from negative one to zero. What is f of x between negative one and zero? It's one minus two sine of x.