3+6-19+42

To solve the expression 3 + 6 - 19 + 42, you can follow the order of operations (parentheses, exponents, multiplication and division from left to right, addition and subtraction from left to right).

First, you need to perform addition and subtraction in the order they appear from left to right:

3 + 6 = 9 9 - 19 = -10 -10 + 42 = 32

So, 3 + 6 - 19 + 42 = 32.