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Symbolic Maths

Toolboxes are adds-ons. One of the most useful and underused (the Symbolic Math toolbox) performs factorisation, integration, etc, so int('1/(1+x^2)') works, as does
     dsolve('D2y = -a^2*y', 'y(0) = 1', 'Dy(pi/a) = 0')
which solves an ODE. The toolbox also makes function plotting easier - ezplot('sin(3*t)',[-10 10]) becomes possible.

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Information provided by Tim Love