TASK DEFINITION: Translate the given Spanish text to English
PROBLEM: Formula (A-) a .

SOLUTION: Formula (A-)a.

PROBLEM: Form the roof of the accommodation and cover it with appropriate sheeting.

SOLUTION: Conformar el tejado del habitáculo y recubrirlo con chapa apropiada.

PROBLEM: of the ultrasonic energy.

SOLUTION:
de la energía ultrasónica.