In 31—39, write a regular expression to define the given set of strings. Use the shorthand notations given in the section whenever convenient. In most cases, your expression will describe other strings in addition to the given ones, but try to make your answer fit the given strings as closely as possible within reasonable space limitations.
38. All telephone numbers that have three digits, then a hyphen. then three more digits, then a hyphen, and then four digits, where the first three digits are either 800 or 888 and the last four digits start and end with a 2.
Mathematical Excursions (MindTap Course List)
Elementary Technical Mathematics
Mathematics: A Practical Odyssey
Mathematics For Machine Technology
Mathematical Applications for the Management, Life, and Social Sciences
Finite Mathematics for the Managerial, Life, and Social Sciences
Introduction To Statistics And Data Analysis
Elements Of Modern Algebra
Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
Calculus of a Single Variable
Understanding Basic Statistics
Statistics for Business & Economics, Revised (MindTap Course List)
Elementary Geometry For College Students, 7e
Intermediate Algebra
Single Variable Calculus: Early Transcendentals
Multivariable Calculus
Calculus: Early Transcendentals
Calculus: Early Transcendental Functions
Research Methods for the Behavioral Sciences (MindTap Course List)
STATISTICS F/BUSINESS+ECONOMICS-TEXT
Contemporary Mathematics for Business & Consumers
Precalculus: Mathematics for Calculus (Standalone Book)
Single Variable Calculus: Early Transcendentals, Volume I
Multivariable Calculus
Calculus: An Applied Approach (MindTap Course List)
Finite Mathematics and Applied Calculus (MindTap Course List)
Statistics for The Behavioral Sciences (MindTap Course List)
Calculus (MindTap Course List)
Study Guide for Stewart's Multivariable Calculus, 8th
Elementary Geometry for College Students
Trigonometry (MindTap Course List)
Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
College Algebra (MindTap Course List)
Essentials Of Statistics For Business & Economics
Single Variable Calculus
Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Essentials Of Statistics
Calculus: Early Transcendental Functions (MindTap Course List)
Probability and Statistics for Engineering and the Sciences
Research Methods for the Behavioral Sciences (MindTap Course List)
Calculus (MindTap Course List)
Calculus Volume 1
A First Course in Differential Equations with Modeling Applications (MindTap Course List)
Calculus Volume 2
Introductory Statistics
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Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card) (MindTap Course List)