What subjects would be mainly there in B.Arch maths? Like, would i have to do a lot of calculus or is it simple? Because im pretty weak math

Im very interested in studying B.arch. Im good at drawing (though there would only be technical drawings), im creative and i feel architecture suits me the most. Bt many people tel me that it is too damn tough and u have to work day and night. And im pretty weak in math though i manage to get 70%.