①5(3a-2b)2-2(2a+3b)2-3(2b-3a)2+4(3b+2a)2;②x2-(1/2)xm+1-(1/5)xm-2xm+1;③(a-1/2)2(a2+1/4)2(a+(1/2)]2;④[-(3/4)x6y3+(6/5)x3y4-(9/10)xy2]÷(3/5)xy2.
①26a2+26b2;②(4/5)x-(3/2)xm+1;③a8-(1/8)a4+(1/256)④-(5/4)x5+2x2y-(3/2)y2
①5(3a-2b)2-2(2a+3b)2-3(2b-3a)2+4(3b+2a)2;②x2-(1/2)xm+1-(1/5)xm-2xm+1;③(a-1/2)2(a2+1/4)2(a+(1/2)]2;④[-(3/4)x6y3+(6/5)x3y4-(9/10)xy2]÷(3/5)xy2.
①26a2+26b2;②(4/5)x-(3/2)xm+1;③a8-(1/8)a4+(1/256)④-(5/4)x5+2x2y-(3/2)y2