Solve the equation :x=(2012-x)^1/2(2013-x)^1/2+(2013-x)^1/2(2014-x)^1/2+(2012-x)^1/2(2014-x)^1/2

Solve Differential Equation: y''-3y'-4=e^xsin4x

Find a(n)of sequence3,9,18,54,63,...   (n=1,2,3,4,...) ,

If a, b and c are the roots of the equation x^3-x^2-x-1=0.
Find S=(a^2014-b^2014)/(a-b)+(b^2014-c^2014)/(b-c)+(c^2014-a^2014)/(c-a)