import numpy as np
x = np.linspace(-4,4,num=50)
y = np.linspace(-4,4,num=50)
X,Y = np.meshgrid(x,y)
Z = np.cos(np.((X**3+Y**3)**(1/3)
执行后提示
File "", line 5
Z = np.cos(np.((X**3+Y**3)**(1/3)))
^
SyntaxError: invalid syntax