B.Sc. Mathematics Courses

Mathematics by Gajendra Purohit

Complex Analysis - Dr. Gajendra Purohit

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This is a short and good course for your syllabus.

Integral transforms - Dr. Gajendra Purohit

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Jaipal Vishwakarma Mathematics

Complex Analysis - Bhagwan Singh Vishwakarma

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NPTEL Courses

Mathematical Methods - NPTEL - PN Agarwal, SK Gupta; IIT Roorkee

NPTEL link

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It's a detailed course on differential equations and integral transformations. Do it for your syllabus.