1. (460+540)+400=1000+400=1400
2. (800-482)+182=800+182-482=982-482=500
3. (720+180)*2=900*2=1800
4. (640-40):3=600:3=200
7,34+(100-x)=56,3
100-x=48.96
x=51.04
84:7*5+(96-34)=122 64:32*18-14*3=66 (72:3-45:15)+53=74
Y`=2x-361/x²=(2x³-361)/x²=0
2x³-361=0
x³=361/2
x=∛(361/2)
y(∛(361/2)=19∛(19/4)+19∛(4/19)