# Organizing Data In The Calculator - HP 49g+ User Manual

Graphing calculator.

This indicates that the general expression for a derivative in the line editor or
in the stack is: ∫(lower_limit, upper_limit,integrand,variable_of_integration)
Press ` to return to the Equation Writer. The resulting screen is not the
definite integral we entered, however, but its symbolic value, namely,
To recover the derivative expression use ‚¯. To evaluate the derivative
again, you can use the D soft menu key. This shows again that
τ
sin(
)
sin(
τ
)
τ
cos(
τ
)
t
t
dt
0
Double integrals are also possible. For example,
which evaluates to 36. Partial evaluation is possible, for example:
This integral evaluates to 36.

## Organizing data in the calculator

You can organize data in your calculator by storing variables in a directory
tree. To understand the calculator's memory, we first take a look at the file
directory. Press the keystroke combination „¡ (first key in second row
of keys from the top of the keyboard) to get the calculator's File Manager
screen:
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