cos(x+y)
A(x)= −0,25·(x −3)2+4
(-125)^2
3*3-3/3+3=
2x+5y=1,\:\:x-3y=2
3^x times 8^(x/[x+2])=6
3^x times 8^(x/x+2)=6
(5x-1)divided by 2=3
4(x-1)-5x=3(x+2)
