Surely, if you are studying integration, one of the first things you learned is that the integral of a constant is that constant times the variable: \(\displaystyle \int A dt= At+ C\) where C is the undetermined "constant of integration". And just shortly after that, that the integral of a constant times the variable is that constant times the variable squared over 2.
Here you are asked to integrate \(\displaystyle \int A+ Bt dt\) where \(\displaystyle A= -35\times 10^{-4}\) and \(\displaystyle B= 4.2\times 10^7\) are just constants.