A) 7(х - y); B) -23+ (2a - 30 + 1); 0) (a - 4b) - 3; г) 1,5 • (- 3х + 4y - 52).

It looks like you are providing some algebraic expressions. Let's simplify each of them:

a) \( 7(x - y) \)

Using the distributive property, we get: \[ 7(x - y) = 7x - 7y \]

B) \( -23 + (2a - 30 + 1) \)

First, simplify inside the parentheses: \[ 2a - 30 + 1 = 2a - 29 \] Now combine with -23: \[ -23 + (2a - 29) = 2a - 29 - 23 = 2a - 52 \]

c) \( (a - 4b) - 3 \)

This expression can be simplified as follows: \[ (a - 4b) - 3 = a - 4b - 3 \]

d) \( 1.5 \cdot (-3x + 4y - 52) \)

Distributing 1.5 gives: \[ 1.5 \cdot (-3x) + 1.5 \cdot 4y + 1.5 \cdot (-52) = -4.5x + 6y - 78 \]

In summary, the simplified forms are: a) \( 7x - 7y \)
B) \( 2a - 52 \)
c) \( a - 4b - 3 \)
d) \( -4.5x + 6y - 78 \)

Let me know if you need further assistance!