Is there a way to input formulas into the form to +,-,/,x,

If you're asking if you can perform mathematical operations and calculations on your form, then yes, you can.

You may either use the Form Calculation Widget or Conditions to calculate results.

Related guides:

How-to-Perform-Form-Calculation-Using-a-Widget

Conditional-Logic-Inserts-Text-Calculation-Into-A-Field

Form-Calculation-Math-Function-Reference