Ini adalah preview:
$F(x)=displaystylefrac{1-sqrt{1-4x}}{2}$
[F(x)=displaystylefrac{1-sqrt{1-4x}}{2}]
[begin{aligned}F(x)&=frac{1-sqrt{1-4x}}{2}\&=displaystylefrac{sum_{k=1}^{infty}binom{frac{1}{2}}{k}(-4x)^k}{ 2}end{aligned}]
berwarna biru
[color{blue}x=1+frac{1}{1+frac{1}{1+frac{1}{1+frac{1}{1+cdots}}}}]
$int_{0}^{frac{pi}{2}}frac{dx}{1+cot{x}}$
$$int_{0}^{frac{pi}{2}}frac{dx}{1+cot{x}}$$