I wanna buy a laptop ASAP?

I'm a grad student at a civil engineering department. I really wanna buy a laptop. As a civil engineering student, I will be dealing with softwares like AutoCad, SAP2000, Etabs, Matlab, Ansys, … Etc. So guys please I need your help, what do you recommend? Lenovo? HP? Toshiba? Dell?
Also, if there is any discounted deals for students, I will appreciate letting me know. Thanks

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