t) [6×10×100-(25×4-40)×5]-(10×10×7+120:3×35)=
=[60×100-(100-40)×5]-(100×7+40×35)=
=(6000-60×5)-(700+1400)=
=(6000-300)-2100=
=5700-2100=
=3600
u) [12×44+(750+450:6+27:9):6]:2+4=
=[528+(750+75+3):6]:2+4=
=[528+(825+3):6]:2+4=
=(528+828:6):2+4=
=(528+138):2+4=
=666:2+4=
=333+4=
=337
v) [12×33+4×(950-250×3+4)]:3+47×13=
=[396+4×(950-750+4)]:3+611=
=[396+4×(200+4)]:3+611=
=(396+4×204):3+611=
=(396+816):3+611=
=1212:3+611=
=404+611=
=1015
