I am in need of assistance. I am following a prof on u-tube, he gave a digital simplification problem, f=(a+b+c)(a+b+!c)(!a+!b+!c) [ != compliment]. He gave the final answer as f=(a+b)(a+!c). When I multiply I get the following(hang on to your hat, there are 18 terms) (aa+ab+a!c+a!a+a!b+a!c+ba+bb+b!c+b!a+b!b+b!c+ca+cb+c!c+c!a+c!b+c!c). Im not trying to use the karnaugh, but im doing the simplification by hand using identities. Any help will be greatly appreciated. thanks