The text for Math 221 is Calculus, 4th Edition, by Frank Ayres, Jr. and Elliott Mendelson. It published as part of the Schaum's Outlines series. It is available from the University book store and costs $17.95.
Here is a list of errors in the text book.
Here is a set of study notes that will guide your use of the textbook.
Calculators: You may want a graphing calculator to help with
homework, but a calculator is not required. In fact, their overuse is heavily discouraged.
Calculators may
not be used during tests.
Repeat: Calculators may
not be used during tests.
Various software applications are very useful in many parts of Mathematics. In particular the programs Maple, Mathematica and Matlab can do many calculations, both numeric and symbolic, and can be used to generate high quality graphs. All three programs are available on various University computers. They are also available for purchase at very reasonable student rates. You are not required to use any such programs, but anyone studying or using advanced mathematics will eventually find them indispensable.