问题及解答

>> x*(2y+7)+(x+5)*z
in> x*(2y+7)+(x+5)*z

out> 2xy+7x+xz+51z
------------------------

>> (x+5)*z
in> (x+5)*z

out> xz+51z
------------------------

>> 5*z
in> 5*z

out> 51z
------------------------

>> 3*p
in> 3*p

out> 3*p1
------------------------

>> 8*q
in> 8*q

out> 8*q1
------------------------