Basic commands
> example1:= diff( exp(a*t), t);
> example2:= Int( exp(a*t), t);
> value( example2 );
> example3:= Int( exp(a*t), t = 0 .. 2);
> value( example3 );
> example4:= Int( exp(-2*t), t = 0 .. infinity);
> value( example4 );
> Y:= (4 * s^2 )/ ( (s^2+1) * (s-5) );
> PFY:= convert( Y, parfrac, s);
> plot(Y, s = -2 .. 4);