7年级数学题,会做的进!,不进我就认为你不会做!!!急!!

①(2+1)*(2^2+1)*(2^4+1)*(2^8+1)…*（2^32+1) 用简便方法解
=[2-1][2+1][2^2+1][2^4+1]...[2^32+1]
=[2^2-1][2^2+1][2^4+1]...[2^32+1]
=[2^4-1][2^4+1]...[2^32+1]
=....
=[2^32-1][2^32+1]
=2^64-1

②已知 3(x+2y)^2+(x+3y+5)=0 , 求-1/3x^2(xy^2+4x^2y-6x^3)+2xy(x^3y-2x^4-1/2y)的值

后面的看不清？