1. Calculation (1) (0.25x-1 / 4) (0.25x + 0.25) (2) (- 7x ^ 3y-3b ^ 2 (7x ^ y-3b ^ 2) (3) (3x-y) (3x + y) 1. Calculation (1) (0.25x-1 / 4) (0.25x + 0.25) (2) (- 7x ^ 3y-3b ^ 2 (7x ^ y-3b ^ 2) (3) (3x-y) (3x + y) + y (x + y) (4) (X-2) (16 + x ^ 4) (2 + x) (4 + x ^ 2) 2. Simple calculation (1) 40 and 2 / 3 × 39 and 1 / 3 (2) 3 × 5 × 17 × (2 ^ 8 + 1)

1. Calculation (1) (0.25x-1 / 4) (0.25x + 0.25) (2) (- 7x ^ 3y-3b ^ 2 (7x ^ y-3b ^ 2) (3) (3x-y) (3x + y) 1. Calculation (1) (0.25x-1 / 4) (0.25x + 0.25) (2) (- 7x ^ 3y-3b ^ 2 (7x ^ y-3b ^ 2) (3) (3x-y) (3x + y) + y (x + y) (4) (X-2) (16 + x ^ 4) (2 + x) (4 + x ^ 2) 2. Simple calculation (1) 40 and 2 / 3 × 39 and 1 / 3 (2) 3 × 5 × 17 × (2 ^ 8 + 1)

1、（1）=（0.25x-0.25）（0.25x+0.25）=（0.25x)^2-0.25^2
（2）=-（7x^3y+3b^2)（7x^y-3b^2）=-49x^6y^2+9b^4
（3）= 9x^2-y^2+y（x+y）= 9x^2+yx
（4）=（x^2-4）（16+x^4）（2+x）（4+x^2）=（x^4-16）（16+x^4）=x^8-256
2、（1）=40+1/3+2/3+39=40+1+39=40+40=80
（2）=3×5×17×[(2^2）^4+1]=3×5×17×[(4^2）^2+1]=3×5×17×(16^2+1)=3×5×17×255
=255×255=255^2