Find and correct mistakes

Please help me to check the following exercise.

There is one mistake in each line. Find and correct them
The word processor and calculator are without a shadow of a doubt here to stay,
--> words
and in many respects our life are much richer for them. But teachers and
--> is
other academics are claiming that we are now starting to feel first significant
--> the first
wave of their effects on a generation of the users. It seems nobody under
--> users
the age of twenty can spell or add up some more. Even several leaders
--> any
at leading universities have commented in the detrimental effect the digital
--> on
revolution has had on most intelligent minds in the country. The problem,
--> the most
evidently, lies with the automatical spellcheck now widely available on
--> automatic
wordprocessing soft ware. Professor John Silver of Sydney university of Australia,
--> software
said: ‘How should we bother to learn to spell correctly or for that matter
--> how to
to learn even the most basic of mathematic sums when the press of a button
--> mathematical
we have a problem answered for us. The implications are enormous. Will the
--> our
adult of the future look to the computer to make decisions for them, tell them who
--> adults
to marry or what the house to buy? Are we heading for a future individual to
--> house
independent human thought?