eighteen *(cot(three *x)^ two - one)*cot(three *x)/ five = zero
18 multiply by ( cotangent of (3 multiply by x) squared minus 1) multiply by cotangent of (3 multiply by x) divide by 5 equally 0
eighteen multiply by ( cotangent of (three multiply by x) to the power of two minus one) multiply by cotangent of (three multiply by x) divide by five equally zero
18*(cot(3*x)2 - 1)*cot(3*x)/5 = 0
18*cot3*x2 - 1*cot3*x/5 = 0
18*(cot(3*x)² - 1)*cot(3*x)/5 = 0
18*(cot(3*x) to the power of 2 - 1)*cot(3*x)/5 = 0
