The image contains several mathematical expressions, and the task is to calculate the value of these expressions for different variable values. Here is a breakdown of what I see:

Expressions:

a) $25 - x$

b) $72 \div a$

c) $3 \cdot b + 7$

d) $x \cdot (5 + x)$

e) $7 + t \div 12$

f) $b^2 - 2 \cdot b$

Instructions:

• You are asked to calculate the value of these terms for the following variable values:
  • $x = 4, 12, -6, -8$
  • $a = 4, 12, -6, -8$
  • $b = 4, 12, -6, -8$
  • $t = 4, 12, -6, -8$

Additionally, a table needs to be created with the values of each expression for the different inputs.

Would you like me to compute the values for all of the expressions and generate the table for you?

Let me know if you have any clarifications, or if you'd like to proceed with a particular variable first!