2004 AIME II Problem 12

Let ABCD be an isosceles trapezoid, whose dimensions are AB = 6, BC=5=DA,and CD=4. Draw circles of radius 3 centered at A and B and circles of radius 2 centered at C and D. A circle contained within the trapezoid is tangent to all four of these circles. Its radius is \frac{-k+m\sqrt{n}}p, where k, m, n, and p are positive integers, n is not divisible by the square of any prime, and k and p are relatively prime. Find k+m+n+p.

Leading zeroes must be inputted, so if your answer is 34, then input 034

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.