Let a = 23 ÷ -45 + 712 + -11619 + 53 × -815 + 727. Then, the value of a is:

Solve: (-2562) × (93-75) = ?

A square is divided into 9 equal squares, out of which 5 squares are shaded. If the shaded portion is expressed in the form of a fraction whose numerator is 25, what will be its denominator?

The expression 25 × -37 + 17 - ≤ -37 × 45 ≥ is equal to: