Six tools for the messy middle of a problem set.
From binomial probabilities to shear-force diagrams. Each calculator shows the working — substitution, intermediate steps, and the final answer — so you can check your math, not just copy it.
The collection.
Each card previews the formula or notation each tool works with — pick by what your problem set looks like, not by name.
Binomial Distribution Calculator
Exact and cumulative probabilities, plus mean, variance, and standard deviation, for any n, k, p combination. Returns the full PMF as a table.
Boolean Expression
Truth tables, K-maps, and minimized SOP / POS form.
Correlation Coefficient (r)
Pearson and Spearman r from paired data. Outputs r, r², p-value, and a scatter overlay.
Organic Chemistry Reactions
Predict products, classify mechanism (SN1 / SN2 / E1 / E2), and balance equations.
Partial Differentiation
First, second, and mixed partials of any multivariable expression — with the chain-rule steps shown explicitly.
Shear Force Diagram
Beam reactions, shear-force, and bending-moment diagrams for point loads, UDLs, and overhangs.
Not just the answer — the working.
Calculators that hide their math train you to memorize buttons. These don’t. Every tool above renders the substitution, the intermediate steps, and the final result in textbook notation — so you can compare it to whatever your professor wants on paper.