plz explain me integration and differentiation with basics and examples and formulas.....plzzzz badly needed.....help as soon as posssible.....reply awiated!!!!!!

 thank you sir!!!!!

 but in the first example how do we get (0=2x)????

in the 2nd example where did 1/2 vanish...why only u-gt ????

in last example how do we get (3t square) and t cube /3????

as dcons./dx=1

so d1/2 /dx=1