We need to find the definite integral, we have to punch this into our calculator, of the square root of, (and I'll write it as x's just because the x button is much easier to get to than trying to put a variable t in there), so the square root of 4x plus 1 squared plus sine of x squared (instead of writing a t here, I'm just writing an x here, just to clarify what I'm doing) and then we want to square that, 