Why I don’t take away points if a student forgets the “+ C” on the exam @blackpenredpen

Why I don’t take away points if a student forgets the “+ C” on the exam @blackpenredpen

Uploaded July 2026 | Updated September 2026, 2 weeks ago

You should still put the +C after an indefinite integral!

Get your +C t-shirt amzn.to/45h8v0A

#calculus

Why I don’t take away points if a student forgets the “+ C” on the exam

Youtube is full of the same wrong method Solving 2^x=x^32 the proper way!

Calculus students don’t use these inequalities anymore!

limit of 1/(1-cos(ln(sin(tan^-1(e^(x^2)))))) as x goes to infinity

So you want the Gaussian integral trick again?

How to solve the three-circle problem from the 2022 GCSE math exam

Factoring x^5+x^4+1 but with only 0, 1, & 2

Making a cubic equation have a double root

National Taiwan University graduate school entrance exam problem

e^x meets ln(x)

I used a double integral to solve a single improper integral

The triangle is 1/2 of a rectangle so why is the cone 1/3 of a cylinder?

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Why I don’t take away points if a student forgets the “+ C” on the exam