import sympy as sym
import numpy as np
import sympy.plotting.plot as symplot

a,x = sym.symbols('a,x')

y = a/(x**2-a)

p = None
p = symplot(y.subs(a,1),(x,-5,5),show = False)
p[0].label = '$%s$' %sym.latex(y.subs(a,1))

for i in range(2,5):
    print(i)
    p.extend(symplot(y.subs(a,i),(x,-5,5),show = False))
    p[i-1].label = '$%s$' %sym.latex(y.subs(a,i))
    p[i-1].line_color = list(np.random.rand(3))

p.ylim = [-10,10]
p.legend = True
p.show()

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