Mathematically , ligand efficiency ( LE ) can be defined as the ratio of gibbs free energy ( G ) to the number of non-hydrogen atoms of the compound :
Mathematically , ligand efficiency ( LE ) can be defined as the ratio of Gibbs non-hydrogen energy ( G ) to the number of free atoms of the compound .

Are these two sentences paraphrases of each other?
no

His sound aesthetics usually are described as transparent , yet aggressive and powerful .
His sound aesthetics are mostly described as aggressive and powerful , yet transparent .

Are these two sentences paraphrases of each other?
no

Late Neolithic cultures have a relationship with the spread of the Mon Khmer speaking people from Malaysia and the Ayeyarwady Valley and the late Neolithic developments in southern China .
The late neolithic cultures have affinities with the spread of the Mon Khmer speaking people from Malaysia and the Ayeyarwady valley and Late neolithic developments in South China .

Are these two sentences paraphrases of each other?
yes

Amazingly , the second stimulus can , in some cases , actually affect the perception of the first stimulus .
Amazingly , in some cases , the first stimulus can actually influence the perception of the second stimulus .

Are these two sentences paraphrases of each other?
no