The calculator offers up to 21 levels of parentheses:
1) First parenthesis level opened – press
for one right-sided parenthesis.
2) Second level opened – press a
second time for two right-sided
parentheses .
3) Third level opened – press a third
time for three right-sided
parentheses .
4) Fourth level opened – press a fourth
time for four right-sided parentheses
.
Numbers of levels greater than four are shown
in the upper left corner of the display.
KEY DEFINITIONS
Basic Function Keys
On/Clear Key – Turns on power.
Pressing once clears the last entry
and the display. Pressing twice
clears all non-permanent values.
Off – Turns all power off. Clears
all non-permanent memory.
Arithmetic operation keys
– Keys used for entering
and numbers.
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