1、y'=10x-9x^(-4)-e^x-4sinx
2、y'=4x^3+cosx-1/x
3、y'=(1+2x)(10x-3)+2(5x^2-3x+1)=10x+20x^2-6x-3+10x^2-6x+2=30x^2-2x-1
4、y'=[(2x-1)(x+3)-(x^2-x+2)]/(x+3)^2=(x^2+6x-5)/(x+3)^2
1、y'=10x-9x^(-4)-e^x-4sinx
2、y'=4x^3+cosx-1/x
3、y'=(1+2x)(10x-3)+2(5x^2-3x+1)=10x+20x^2-6x-3+10x^2-6x+2=30x^2-2x-1
4、y'=[(2x-1)(x+3)-(x^2-x+2)]/(x+3)^2=(x^2+6x-5)/(x+3)^2