1550.
1) y=x5−3x3+2x2−x+3x3=
=x2−3+2x−1−x−2+3x−3;
=2x−2x2+2x3−9x4=
=2x5−2x2+2x−9x4.
2) y=6xx3x=6x∙x13x12=6x43x12=
=6x43−12=6x56;
y′(x)=6(x56)′=6∙56x−16=
=5x−16=5x6.