two *(x/(x^ two + one)^ two + one /((x - three)*(x^ two + one)) + acot(x)/(x - three)^ two)/(x - three) = zero
2 multiply by (x divide by (x squared plus 1) squared plus 1 divide by ((x minus 3) multiply by (x squared plus 1)) plus arcco tangent of gent of (x) divide by (x minus 3) squared ) divide by (x minus 3) equally 0
two multiply by (x divide by (x to the power of two plus one) to the power of two plus one divide by ((x minus three) multiply by (x to the power of two plus one)) plus arcco tangent of gent of (x) divide by (x minus three) to the power of two) divide by (x minus three) equally zero