$$\frac{2xa^{2}c^{x}-1}{25xa^{x}}$$
$\frac{2xa^{2}c^{x}-1}{25xa^{x}}$
$\frac{2\left(ax\right)^{2}\ln(c)c^{x}-2\left(ax\right)^{2}\ln(a)c^{x}+x\ln(a)+1}{25x^{2}a^{x}}$
