Hebrew is a West Semitic language of the Afroasiatic language family. Culturally, it is considered by Jews and other religious groups as the language of the Jewish people, although other Jewish languages had originated among diaspora Jews, and the Hebrew language was also used by non-Jewish groups. wikipedia.org

Russian is a Slavic language used primarily in Russia, Belarus, Uzbekistan, Kazakhstan, Tajikistan and Kyrgyzstan. It is an unofficial but widely spoken language in Ukraine, Moldova, Latvia, Turkmenistan and Estonia and, to a lesser wikipedia.org

Ukrainian is a language of the East Slavic subgroup of the Slavic languages. It is the official state language of Ukraine. Written Ukrainian uses a variant of the Cyrillic script. wikipedia.org

The Chinese language is a language or language family consisting of varieties which are mutually intelligible to varying degrees. About one-fifth of the world's population, or over one billion people, speaks some variety of Chinese as their native language. wikipedia.org

Translation from English to Russian and Russian to English.

Translation from English to Chinese and Chinese to English.

Translation from English to Ukranian and Ukrainian to English.

Translation from English to Hebrew and Hebrew to English.

Mathematics is the abstract study of topics encompassing quantity, structure, space, change, and other properties. wikipedia.org

Translation from English to Hebrew and Hebrew to English.

Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text.

Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text.

Translation from English to Russian and Russian to English.