from sympy.plotting import plot

plot(1/x)

plot(1/x,(x, 0, 3))

plot(Heaviside(x))

plot(sqrt(x))

plot(-sqrt(sqrt(x)),sqrt(sqrt(x)))

plot(LambertW(x))

plot(LambertW(x), sqrt(LambertW(x)), (x, -2, 1))