8. Definite Integrals

Evaluate the following summation: 

$\(\sum\)_{i=1}^4i^2-3i+8$

Evaluate the following summation: 

$\(\sum\)_{k=1}^4\(\left\)(\(\frac{k}{_{}\)2}\(\right\))^2$

Evaluate the following summation: 

$\(\sum\)_{i=0}^2\(\frac{2i}{3}\)$

Evaluate the following summation: 

$\(\sum\)_{t=2}^65t+\(\frac{4}{t}\)$