Question

3*5,2+7*9,3+7*10,7+3*14,8

Answer 1

$3 cdot 5,2+7 cdot 9,3+7 cdot 10,7+3 cdot 14,8=\=15,6+65,1+74,9+44,4= \ =80,7+74,9+44,4= \ =155,6+44,4= \ = boxed{200}.$