(-cos(x) + four *sin(x)/x + six *cos(x)/x^ two)/x^ two = zero
( minus co sinus of e of (x) plus 4 multiply by sinus of (x) divide by x plus 6 multiply by co sinus of e of (x) divide by x squared ) divide by x squared equally 0
( minus co sinus of e of (x) plus four multiply by sinus of (x) divide by x plus six multiply by co sinus of e of (x) divide by x to the power of two) divide by x to the power of two equally zero
(-cos(x) + 4*sin(x)/x + 6*cos(x)/x2)/x2 = 0
-cosx + 4*sinx/x + 6*cosx/x2/x2 = 0
(-cos(x) + 4*sin(x)/x + 6*cos(x)/x²)/x² = 0
(-cos(x) + 4*sin(x)/x + 6*cos(x)/x to the power of 2)/x to the power of 2 = 0
(-cos(x) + 4sin(x)/x + 6cos(x)/x^2)/x^2 = 0
(-cos(x) + 4sin(x)/x + 6cos(x)/x2)/x2 = 0
-cosx + 4sinx/x + 6cosx/x2/x2 = 0
-cosx + 4sinx/x + 6cosx/x^2/x^2 = 0
(-cos(x) + 4*sin(x) divide by x + 6*cos(x) divide by x^2) divide by x^2 = 0