280:/60×15/_/25+3×8/:7+3×/720:80

Question

280:/60×15/_/25+3×8/:7+3×/720:80

Answer 1

280:(60:15)-(25+3*8):7+3*(720:80)=280:4-(25+24):7+3*9=70-49:7+27=70-7+27=90