La calculadora de modelo anterior, hp 17 BII BUSINESS, no permite que
esto suceda. Al hacierlo indicaba, FORMULA INCORRECTA. Análogamente
la calculadora HP 19C, que ha sido descontinuada, no acepta este error.
English Translation:
Today's model hp 17bII+ financtial calculator, has an error in its
program.
Thus, if an equation es entered, accepts an uneven number of
parenthesis:
( 5 + 7 ) - ( 8 / 7 = M
Previous model, hp 17BII business, did not allow this to happen,
showing INVALID EQUATION. Similarly, the calculator HP 19C, which has
been discontinued, does not accept this error.