Four mixed operations 30 to have the process and the answer urgently needed!

1) 311×8-8-8×112= 2) 98×100+197×98= 3) 6×3+6+194×6= 4) 12×15+12+182×12= 5) 304×10-10-10×105= 6) 17×180+17+17×17= 7) 85×82+17×85= 8) 336×20-20-20×137= 9) 398×32-32-32×1= 10) 390×166+...

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