factorize y= -2x^2+9x-4
2^23624
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
