[Ahmed kandil]

Hello everyone
I'm trying to write an expression for inlet temp with time and this is my expression
0.016[S]*t^6-0.2703[S]*t^5+1.6363[S]*t^4-4.3126[S]*t^3+5.1111[S]*t^2-1.6118[S]*t+298.26[S]
but i get this error
All arguments should have the same dimensions as the first argument [kg^-1 m^-2 s^9 A^2] but argument 2 has dimensions of [kg^-1*m^-2*s^8*A^2]
how i can solve this problem