(- one - two *cosh(x)^ two /sinh(x)^ two)/sinh(x) = zero
( minus 1 minus 2 multiply by hyperbolic co sinus of e of ine of (x) squared divide by hyperbolic sinus of e of (x) squared ) divide by hyperbolic sinus of e of (x) equally 0
( minus one minus two multiply by hyperbolic co sinus of e of ine of (x) to the power of two divide by hyperbolic sinus of e of (x) to the power of two) divide by hyperbolic sinus of e of (x) equally zero
(-1 - 2*cosh(x)2/sinh(x)2)/sinh(x) = 0
-1 - 2*coshx2/sinhx2/sinhx = 0
(-1 - 2*cosh(x)²/sinh(x)²)/sinh(x) = 0
(-1 - 2*cosh(x) to the power of 2/sinh(x) to the power of 2)/sinh(x) = 0
(-1 - 2cosh(x)^2/sinh(x)^2)/sinh(x) = 0
(-1 - 2cosh(x)2/sinh(x)2)/sinh(x) = 0
-1 - 2coshx2/sinhx2/sinhx = 0
-1 - 2coshx^2/sinhx^2/sinhx = 0
(-1 - 2*cosh(x)^2 divide by sinh(x)^2) divide by sinh(x) = 0