The first derivative
[src]
2 7
7*cosh(7*y + 1) + 15*y + -------
___
2*\/ y
$$15 y^{2} + 7 \cosh{\left(7 y + 1 \right)} + \frac{7}{2 \sqrt{y}}$$
The second derivative
[src]
7
30*y + 49*sinh(1 + 7*y) - ------
3/2
4*y
$$30 y + 49 \sinh{\left(7 y + 1 \right)} - \frac{7}{4 y^{\frac{3}{2}}}$$
The third derivative
[src]
21
30 + 343*cosh(1 + 7*y) + ------
5/2
8*y
$$343 \cosh{\left(7 y + 1 \right)} + 30 + \frac{21}{8 y^{\frac{5}{2}}}$$