Please simplify the following expressions:
(p^2+4p-23)-(3p^2-23p-23)
(5z-2)(5z+2)
(2m-4)(m^2+2m+4)
Thank you for your much appreciated help.
(p^2+4p-23)-(3p^2-23p-23)
(5z-2)(5z+2)
(2m-4)(m^2+2m+4)
Thank you for your much appreciated help.