Why Implicit? Explicit Instead?

I am really not so expert in Maths alright?

Calculus Maths some more?
Implicit Differentiation some some more?
Ok I almost burst my brain tonight
It is time to screw the loosing part of my brain
And to polish those rusty part as well
Let's put on a tabard
And be ready for the ever changing challenges!
Woo~hoo~