H
huansss


moi nguoi oi lam on giai dum voi minh lam nhung ko ra 4^(x^2)+x*3^x+3^(x+1)=2*x^2*(3^x)+2x+6,
(can 7)^(x+1)+7(x^2-2)=7^(x^2+x-4)+7,
x^(4tan(x/4))=1600^2
(can 7)^(x+1)+7(x^2-2)=7^(x^2+x-4)+7,
x^(4tan(x/4))=1600^2