Check if a String is a Mathematical Expression

Create a function that takes an input (e.g. "5 + 4") and returns true if it's a mathematical expression or false if not.

Examples

mathExpr("4 + 5") ➞ true

mathExpr("4*6") ➞ true

mathExpr("4*no") ➞ false

Notes

• Should only work with the following operations: +, -, *, /, %
• You don't need to test for floats.
• int1 and int2 will only be from 0-9.