90-5•5+26= 5•(54-47)=

Let's solve each expression step-by-step.

1. For the expression \(90 - 5 \cdot 5 + 26\):

   • First, calculate \(5 \cdot 5 = 25\).
   • Now substitute that back into the expression: \(90 - 25 + 26\).
   • Then, perform the subtraction: \(90 - 25 = 65\).
   • Finally, add \(26\): \(65 + 26 = 91\).

   So, \(90 - 5 \cdot 5 + 26 = 91\).

2. For the expression \(5 \cdot (54 - 47)\):

   • Start by calculating the expression in the parentheses: \(54 - 47 = 7\).
   • Now substitute that back: \(5 \cdot 7\).
   • Then multiply: \(5 \cdot 7 = 35\).

   So, \(5 \cdot (54 - 47) = 35\).

Final results:

• \(90 - 5 \cdot 5 + 26 = 91\)
• \(5 \cdot (54 - 47) = 35\)