Revert "More typos"

This reverts commit 7f657dd22ac20d22698c53b23f0057e1a12c09b7.
Revert "Revert "More typos""

This reverts commit 440bff395eb5bc54e83154b0f87e98b3aa98efac.
Revert "Revert "Revert "More typos"""

This reverts commit 1e95b4e110db19dff1ebbb60bd80959cea487bc1.
Caching the inverse of a matrix

the code have 3 sections . 1.Put comments ; 2.code ; 3.example
Revert "Caching the inverse of a matrix"

This reverts commit c9163d09bc6aa61a209e236e95550d466a9eeedb.
Revert "Revert "Caching the inverse of a matrix""

This reverts commit b7c51c79e81ed96283af5083b01e26a1e55ac9ac.
Revert "Revert "Revert "Caching the inverse of a matrix"""

This reverts commit 0f44a96b598ac4586f278ff6fd37c3978d484442.