Видео с ютуба Blackpen Redpen De
How to blackpenredpen!
i did another 100 integrals!
Fun maths #dtwtutorials #blackpenredpen
the answer! @blackpenredpen
Cosine Conundrum: Cracking the Berkeley Bee Integral with @blackpenredpen
you haven't seen this before! @blackpenredpen
when calculus students use trig identities too early
When a calculus teacher says “I will only put 1 integral on the test”
Math’s Deepest Lesson: Why e^x is Unstoppable 🧠
this is how you can get an A on your calculus test!