Terms of use

Cuadrivio is a free symbolic calculator and a free course. There is no account to open, nothing to buy and nothing to subscribe to.

It is a study aid. It is not a teacher, an examiner or an accreditation, and nothing it produces is a qualification.

Every answer is verified by a method independent of the one that produced it: an integral is differentiated back, a derivative is compared against numerical differentiation, a matrix inverse against A·A⁻¹ = I. That is a stronger check than most tools make, and it is still not a promise.

Mathematical software has bugs, a question can be read in more than one way, and an examiner marks the method as well as the result. Check anything that matters before you hand it in, and treat a worked solution here as a second opinion rather than the last word. We accept no liability for marks lost or decisions taken on the strength of an answer from this site.

Solving a problem costs real computation, so requests are rate limited per address. Please do not work around that limit, and do not submit problems in bulk by automated means: it takes the solver away from the students it is for.

Do not attempt to escape the solver's sandbox, to probe the site for vulnerabilities without asking first, or to interfere with its availability for anybody else. If you do find a security problem, the contact address below is the right place to send it, and such a report is welcome.

The site is offered as it stands, with no promise that it will be available, complete or unchanged. Modes may be added or withdrawn, and the whole of it may be taken down.

To the fullest extent the law allows, the site is provided without warranty and its operator is not liable for loss arising from its use. Nothing here limits any liability that cannot lawfully be limited, nor any right you have as a consumer.

These terms are governed by Spanish law, without prejudice to the protection you are entitled to under the law of your own country of residence. If they change, the revised version appears on this page.

Questions about any of this, or about a stored problem: contact@cuadrivio.app