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