diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst
--- a/Doc/tutorial/introduction.rst
+++ b/Doc/tutorial/introduction.rst
@@ -105,18 +105,18 @@
    (-1+0j)
    >>> 1j * complex(0,1)
    (-1+0j)
-   >>> 3+1j*3
+   >>> 3 + 1j * 3
    (3+3j)
-   >>> (3+1j)*3
+   >>> (3+1j) * 3
    (9+3j)
-   >>> (1+2j)/(1+1j)
+   >>> (1+2j) / (1+1j)
    (1.5+0.5j)
 
 Complex numbers are always represented as two floating point numbers, the real
 and imaginary part.  To extract these parts from a complex number *z*, use
 ``z.real`` and ``z.imag``.   ::
 
-   >>> a=1.5+0.5j
+   >>> a = 1.5 + 0.5j
    >>> a.real
    1.5
    >>> a.imag
@@ -127,7 +127,7 @@
 correct way to convert a complex number to a real number.  Use ``abs(z)`` to get
 its magnitude (as a float) or ``z.real`` to get its real part. ::
 
-   >>> a=3.0+4.0j
+   >>> a = 3.0 + 4.0j
    >>> float(a)
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
@@ -253,7 +253,7 @@
 line above could also have been written ``word = 'Help' 'A'``; this only works
 with two literals, not with arbitrary string expressions::
 
-   >>> 'str' 'ing'                   #  <-  This is ok
+   >>> 'str' 'ing'             #  <-  This is ok
    'string'
    >>> 'str'.strip() + 'ing'   #  <-  This is ok
    'string'