0 ≤ x ≤ 1
–∛ x≤ y ≤ x3
= ∫1 0 ∫ x3–∛x(4xy+16x3y3)dy)dx=
=∫1 0 (4x·(y2/2)+16x3((y4/4))| x3–∛x)dx=
=∫1 0((4x·((x3)2/2)+16x3(((x3)4/4) – (4x·((–∛x)2/2)+16x3(((–∛x)4/4))dx=
=∫1 0(2x7+4x15+2x5/3 –4x13/3)dx=(2·(x8/8)+4·(x16/16)+2·x8/3/(8/3)–4·x16/3/(16/3))|10=
=(2/8)+(4/16))+(6/8)–(12/16)=1/2