(2/91-8/19)

To solve the expression (2/91-8/19) in Russian, we first need to find a common denominator for the fractions. In this case, the common denominator is 91 * 19 = 1729.

Rewriting the fractions with the common denominator:

2/91 = (2 * 19) / 1729 = 38 / 1729 8/19 = (8 * 91) / 1729 = 728 / 1729

Subtracting the fractions:

(38 - 728) / 1729 = -690 / 1729

So, the solution to the expression (2/91-8/19) is -690/1729 when simplified.