Помогите математика тема интеграл

4) $\frac{2x ^{6} }{6} \left \{ {{1} \atop {-1}} \right. = \frac{x^{6}}{3} \left \{ {{1} \atop {-1}} \right. = \frac{1}{3}- \frac{1}{3}=0$

$- \frac{1}{x} - x^{3} \left \{ {{4} \atop {2}} \right. } = -\frac{1}{4}-64+ \frac{1}{2}+8=-0,25-56+0,5 =-55,25$

5) $\int\limits^3_1 { (x^{2} +4x+5)} \, dx = \frac{ x^{3} }{3}+2 x^{2} +5x \left \{ {{3} \atop {1}} \right. =9+18+15- \frac{1}{3}-2-5=$ 35-1/3= $34 \frac{2}{3}$