check the B_correst for test case 3
Find the dimensions of a matrix
Sum of the Matrix Elements
Find out value of sine given by degree.
Draw a 'X'!
Element-wise vector product (★)
Factorize uniquely! (★★)
Mo money, mo math #2! (★★★)
Matrix indexing with two vectors of indices (★★)
Approximate functions 2 (★★★★)
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