计算::(1/3x+3y)²
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
[(3x+y)²-(3x-y)²]÷(4x-2y)计算 怎么做?
数学用乘法公式计算(x+y+1)(x+y-1)(2x-y-3)²
(x-y)·2(x-y)²·3(x-y)³ 计算
1.计算:x-y分之x+y + y-3分之2x 2.计算:x+3分之x²-x-2 除以 (2-x) + x+3
(3x²y)³·(-4x)计算
计算:(xy-x²)×x-y/xy
计算(x²/x+2y)-x+2y-2
x·(9x³y-3xy²)÷(﹣3x²y) 计算
计算:x•(9x³y-3xy²)/(-3x²y)
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²