Help guys - I have loads of these to do and I can't get my head to work. I would really appreciate some detailed help so I can do the rest without exploing

sin(2x+3y)=3x^3y^2+4

imp. dif. to get dy/dx=f(x,y)

and

find the indefinite integral of g(x)=1 / (x^2 - 25)

for (-5 < x < 5 )

Thank you for any help you can give me!