import sympy as sy 01 展开表达式 expand() import sympy as sy x,y,z=sy.symbols('x,y,z') print(sy.expand(x*(y+z))) print(sy.expand((x+y)**3)) print(sy.expand(x**(y+z))) print(sy.expand(sy.sin(x+y),trig=True)) print(sy.expand_trig(sy.sin(x+y))) x*y + x*z ...