f1 := sin(7*x); # the first step is usually to define a function you give the function a name like f1 every coomand ends with a semicolon.

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# once you define a function you can perform operations on it.int(f1,x); #this will do the indefinite integral

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int(f1,x=0..1); #this is a definite integral so you get number

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evalf(int(f1,x=0..1)); #If you expected a number and got an expression, you can force a numerical evaluation with the evalf command

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plot(f1, x=0..1); # you can gererate a 2-d plot this way. Notice you have to give the x limits but do not have to give y limits

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diff(f1,x); #this is the command for doing derivatives

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#notice that the menu bar has buttons for integrals detrivatives logs, etc.