parentheses in formula missing?

[TobiasSL1]

Describe the error
Are the parentheses around 2^n-1 missing (2^n-1)?

Error Location
std-book formula 6.2, page 98

and in the next formula 6.3 is the "+V ref-" is missing on the right side?

[theembeddedrustacean]

Thank you for reporting! The typo will be fixed in the upcoming update.
This issue will be kept open until then!