What is the value of the expression `(1+x)(1+x^2)(1+x^4)(1+x^8)(1-x)` ? `x^8+1` (b) `x^(16)-1` (c) `1+x^(16)` (d) `1-x^(16)`

Maximum value of the expression (10x^(12))/(x^(24)+2x^(12)+3x^(16)+3x^(8)+1)

What is the value of the expression (x-1)/(x^(3//4) + x^(1//2)) xx (x^(1//2) + x^(1//4))/(x^(1//2) + 1) xx x^(1//4) , when x = 16?