Question

1. 18(5³ - 2⁷) - 10

Explanation:

Step1: Calculate exponents

$5^3=125$, $2^7=128$

Step2: Compute bracket value

$125 - 128 = -3$

Step3: Multiply by 18

$18\times(-3) = -54$

Step4: Subtract 10

$-54 - 10 = -64$

Answer:

$-64$