1) (5/2c) - 5 = 5/(2c) - 5 = (5 - 10c)/2c
2) 5/(5 + 2c) = 5/(5 + 2c)
3) 5/(5 - 2c) = 5/(5 - 2c)
4) -(5/2c) = -5/(2c)
5) 30/(25 - 4c^2) = 30/(25 - 4c^2)
1) (5/2c) - 5 = 5/(2c) - 5 = (5 - 10c)/2c
2) 5/(5 + 2c) = 5/(5 + 2c)
3) 5/(5 - 2c) = 5/(5 - 2c)
4) -(5/2c) = -5/(2c)
5) 30/(25 - 4c^2) = 30/(25 - 4c^2)