7/8:(0, 75•14/15:1,2)=

To solve this expression, we need to follow the order of operations, which is usually represented by the acronym PEMDAS (Parentheses, Exponents, Multiplication/Division, Addition/Subtraction).

Let's break down the expression step by step:

Step 1: Simplify the expression within the parentheses (0, 75•14/15:1,2): 75•14/15 = 1050/15 = 70

Step 2: Substitute the simplified expression back into the original expression: 7/8:70:1,2

Step 3: Evaluate the expression from left to right according to the division operation: 7/8 = 0.875

Step 4: Substitute the evaluated expression back into the original expression: 0.875:70:1,2

Step 5: Evaluate the rest of the expression from left to right according to the division operation: 0.875:70 = 0.0125

Step 6: Finally, evaluate the remaining division operation: 0.0125:1,2 = 0.0104

Therefore, 7/8:(0, 75•14/15:1,2) equals 0.0104.