1
F(x)=x³+C
2
F(x)=1/2sin2x-1/3cos3x+C
3
F(x)=-1/(3x-1)²+C
4
F(x)=1/5e^(5x+1)
5
f(x)=-3/sin²3x
<span>F(x)=ctg3x</span>
<span>(3x+y)^2+(3xy-1)^2-(3x-y)^2=
</span>((3x+y)+(3x-y))(<span>(3x+y)+<span>(3x-y))</span>+(3xy-1)^2=
</span>(6x)(<span>2y)+(3xy-1)^2=</span>(12xy)+(3xy)^2-<span>6xy+1=
</span>=(3xy)^2+<span>6xy+1=</span>(3xy+1)^2=(3xy+1)(3xy+1)