If `int (x^13-x^8)/(3x^5+2)^4 dx=C-x^q/(p(3x^5+2)^3)`, where `C` is a constant of integration and `p,q in NN`, then `(p-q-8)` is equal to
(A)   `cot(cot^(-1) 1)+tan(tan^(-1) 1)`     B)   `(tan(tan^(-1) 1)+cot(cot^(-1) 1))/2`
(C)   `(sum_(r=1)^2015 sin (sin^(-1)(1/r)))/(sum_(r=1)^2015cos (cos^(-1)(1/r)) `       (D)  `(2sum_(i=1)^3 tan^(-1)(i))/(sum_(i=1)^3 cot^(-1)(i)) `