input: Access to homework collaborative projects and learning applications anytime and everywhere just by signing in
fixed: Access to homework, collaborative projects and learning applications, anytime and everywhere, just by signing in

input: Their determinants are 1b and dI respectively so the solution for dY by Cramers Rule is
fixed: Their determinants are (1-b) and dI, respectively, so the solution for dY by Cramer's Rule is

input: In the first days after surgery I was very poor Thinly arm does not work quite right
fixed: In the first days after surgery, I was very poor. Thinly arm does not work quite right.

input: Other games like Track Field Game
fixed:
Other games like Track & Field Game