Here are the solutions to the equations:

1. $1 + 4 = 5$
2. $9 - 2 \times 3 = 9 - 6 = 3$
3. $(7 - 5) \times (3 + 1) = 2 \times 4 = 8$

If you'd like more details or explanations, feel free to ask!

Here are 5 related questions for practice:

1. What is $3 + 6 \times 2$?
2. Simplify $12 - 4 + 2 \times 5$.
3. Calculate $(5 + 2) \times (8 - 3)$.
4. What is the result of $15 \div 3 + 2 \times 5$?
5. Solve $(9 - 6) \times (4 + 3)$.

Tip: Remember to follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right)).