Academia
Linear Algebra
Guide to Linear Algebra, Ivan Savov - Pages 131 to 362. Linear Algebra A Modern Introduction, David Poole - Pages 1 to 619.
Proof
An Introduction to Mathematical Reasoning, Peter J. Eccles - Pages 1 to 298. Understanding Mathematical Proof, John Taylor and Rowan Garnier - Pages 1 to 332.
Probability and Statistics
Probability and Statistics, Jay L. Devore - Pages 52 to 93, 95 to 139, 141 to 196. A First Course in Probability, Shelden Ross - Pages 1 to 450.
Maple
Maple by Example, Martha L. Abell and James B. Braselton - 1 to 538.