(-2x)^4-(-3x²)²-[-(4x²)²]+3(-x)³·x
4x²-1/3x²-x·9x³-x/2x^4-x³计算 急
3x⁷*x⁴+2x*x²*x⁴-4x⁵*(-x)²
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
(x+1)/(x²+3x+2)+(x²-2x)/(x²-4)
(x-2分之3x-x+2分之x)乘x分之x²-4
3x³-2x*x²
2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1) 2x²f(1/x)
先化解,在求值;(3x/x-1-x/x+1)÷x四次方-4x²/x³-x,其中x=根号2+2
计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x
(4x³)²×[x³-x(2x-1)]