(7357+2848)+5152= (54271+39999)+10001= 19999+(4801+15200)= 18356+(1644+2136)=

Let's solve each of the equations step by step:

1. \( (7357 + 2848) + 5152 \)
   First add \( 7357 + 2848 \): \[ 7357 + 2848 = 10205 \] Now add \( 5152 \): \[ 10205 + 5152 = 15357 \] So, \( (7357 + 2848) + 5152 = 15357 \)

2. \( (54271 + 39999) + 10001 \)
   First add \( 54271 + 39999 \): \[ 54271 + 39999 = 94270 \] Now add \( 10001 \): \[ 94270 + 10001 = 104271 \] So, \( (54271 + 39999) + 10001 = 104271 \)

3. \( 19999 + (4801 + 15200) \)
   First add \( 4801 + 15200 \): \[ 4801 + 15200 = 20001 \] Now add \( 19999 \): \[ 19999 + 20001 = 40000 \] So, \( 19999 + (4801 + 15200) = 40000 \)

4. \( 18356 + (1644 + 2136) \)
   First add \( 1644 + 2136 \): \[ 1644 + 2136 = 3000 \] Now add \( 18356 \): \[ 18356 + 3000 = 21356 \] So, \( 18356 + (1644 + 2136) = 21356 \)

To summarize the results:

• \( (7357 + 2848) + 5152 = 15357 \)
• \( (54271 + 39999) + 10001 = 104271 \)
• \( 19999 + (4801 + 15200) = 40000 \)
• \( 18356 + (1644 + 2136) = 21356 \)