Evaluate the following.

Evaluate the following using the Order of Operations.

 $20-3^2\times2$  

Evaluate the following using the Order of Operations.

 $5^2-4\times5$  

Evaluate the following expression by substituting the number for the variable.

 $x^2,\ \ for\ x=3$  

 $2y+1,\ \ \ for\ \ y=2$  

Evaluate the following expression.

 $3g+2,\ \ \ for\ g=10$  

Evaluate the following expression.