Here dydx[1] is the first order derivative and dydx[2] is the second order derivative. After copying the formula, you will have to edit the derivatives with & kformula;. Here is how it is done. First copy and paste the bottom expression into the formula editor.
Aquí dydx[ 1] é a derivada de primeira orden e dydx[ 2] é a de segunda orden. Tras copiar a fórmula terá que editar as derivadas con & kformula;. Isto faise así. Primeiro copie e apegue a expresión do fondo no editor de fórmulas.