- two *(tan((two *x + pi)/ six)^ two + one)*tan((two *x + pi)/ six)/ nine = zero
minus 2 multiply by ( tangent of ((2 multiply by x plus Pi ) divide by 6) squared plus 1) multiply by tangent of ((2 multiply by x plus Pi ) divide by 6) divide by 9 equally 0
minus two multiply by ( tangent of ((two multiply by x plus Pi ) divide by six) to the power of two plus one) multiply by tangent of ((two multiply by x plus Pi ) divide by six) divide by nine equally zero