@Test
public void testDerivative() {
assertEquals(p.derivative().apply(2), 172, 0);
assertTrue(p.derivative() instanceof Sum);
}
@Test
public void testIntergrand() {
System.out.println(p.intergrand().apply(2));
assertTrue(p.intergrand().apply(2) < 43 && p.intergrand().apply(2) > 42.9);
assertTrue(p.intergrand() instanceof Sum);
}
@Test
public void testPolynomial() {
assertEquals(p.apply(2), 96, 0);
assertEquals(p.apply(0), 0, 0);
assertEquals(p.apply(-1), 3, 0);
}