“Three increased by one”
“Increased” here is a keyword for *addition*. If you’re increasing something, you’re *adding to it*. Here, we’re adding 1 to 3, so we’d write that
3 + 1
“Equals the quotient of eight and two”
“Equals” is self explanatory. In the same way we call the result of addition a *sum*, the result of subtraction a *difference,* and the result of multiplication a *product*, we call the result of division a *quotient*. The “quotient of eight and two” is the result we get from dividing 8 by 2:
8 / 2
Putting it all together:
3 + 1 = 8 / 2