import sympy as sp
import japanize_matplotlib

x=sp.var('x',real=True)
y=(x**2+x)/sp.Abs(x)
lim_right = sp.limit(y, x, 0, '+')
lim_left = sp.limit(y, x, 0, '-')

p=sp.plot(y,(x,-5,5),line_color='b',title='数学Ⅲ 関数の極限 練習２',ylabel='y'
           ,label='x=0 における右側極限{} 左側極限{}'.format(lim_right,lim_left),legend=True)