-x*exp((-x)/ two)/ two + exp(one)^((-x)/ two) = zero
minus x multiply by exponent of (( minus x) divide by 2) divide by 2 plus exponent of (1) to the power of (( minus x) divide by 2) equally 0
minus x multiply by exponent of (( minus x) divide by two) divide by two plus exponent of (one) to the power of (( minus x) divide by two) equally zero
-x*exp((-x)/2)/2 + exp(1)((-x)/2) = 0
-x*exp-x/2/2 + exp1-x/2 = 0
-xexp((-x)/2)/2 + exp(1)^((-x)/2) = 0
-xexp((-x)/2)/2 + exp(1)((-x)/2) = 0
-xexp-x/2/2 + exp1-x/2 = 0
-xexp-x/2/2 + exp1^-x/2 = 0
-x*exp((-x) divide by 2) divide by 2 + exp(1)^((-x) divide by 2) = 0