s = 0.7 (slider from 0 to 5, step 0.1)
m = 3 (slider from 0 to 5, step 0.1)
k = 1 (slider from 1 to 3, step 1)
f(x) = 1 / (s * sqrt(2 * π)) * ℯ^(-1 * 0.5 * ((x - m) / s)^(2))
p = Integral(f, m - k * s, m + k * s)