Hyperbolic functions, express sinh4x in exponential form

hello

express 4sinh(4x) + 10soch(4x) in exponential form

I got 7e^4x + 3e^-4x but Ii feel I got this incorrect.

Best answer gets 10 points :). I'm aware I posted a question earlier, best answer is to be chosen, It wont let me choose a answer at this time.

Thanks

I hope it will be useful to you
http://d.yimg.com/hd/answers/i/0f75d316b…

I presume instead of soch you mean cosh

So 4(e^(4x) - e^(-4x))/2 + 10 (e^(4x) + e^(-4x))/2 = 2e^(4x)- 2e^(-4x) + 5e^(4x) + 5e^(-4x)

= 7e^(4x) - 3e^(-4x). (looks like you made a simple sign error)

10 points or 10000 points is nothing

replace
sinh(4x) by (e^(4x)-e^(-4x))/2 and

cosh(4x) by (e^(4x)+e^(-4x))/2

then simplify