two *((x^ two + one)^(- two) + one /(x^ two *(x^ two + one)) + acot(x)/x^ three) = zero
2 multiply by ((x squared plus 1) to the power of ( minus 2) plus 1 divide by (x squared multiply by (x squared plus 1)) plus arcco tangent of gent of (x) divide by x cubed ) equally 0
two multiply by ((x to the power of two plus one) to the power of ( minus two) plus one divide by (x to the power of two multiply by (x to the power of two plus one)) plus arcco tangent of gent of (x) divide by x to the power of three) equally zero