Simple calculation of (67 × 76 + 76 × 58) × 8 and 79 × 125

Simple calculation of (67 × 76 + 76 × 58) × 8 and 79 × 125

76x(67+58)x8=76x(125x8)=76x1000=76000
79x125=(80-1)x125=80x125-125=10000-125=99875