Question

55 - (5² × 3) - 5²

Explanation:

Step1: Calcular potencias internas

$5^2 = 25$

Step2: Sustituir y multiplicar

$(25 \times 3) = 75$

Step3: Restar dentro de corchetes

$75 - 25 = 50$

Step4: Restar el resultado final

$55 - 50 = 5$

Answer:

$5$