Given a sentence in Tagalog language, translate the sentence to English language keeping the meaning of the original sentence intact.

Tagalog sentence: Ang mga pangunahing problema sa lugar na ito ay upang mahanap ang isang nonsingular algebraic iba't-ibang U, na birationally ay katumbas ng isang hindi na mababawasan algebraic iba't-ibang V, tulad na ang mapping f: UV ay regular na ngunit hindi biregular.
The main problem in this area is to find a nonsingular algebraic variety U, that is birationally equivalent to an irreducible algebraic variety V, such that the mapping f: U V is regular but not biregular.

Tagalog sentence: Una sa lahat, ang bayan ay puno ng mga supermarket, mga presyo ay makatwirang, medium-Russian.
First of all, the city is full of supermarkets, prices are reasonable, middle-Russian.

Tagalog sentence: At iibigin mo ang Panginoon mong Diyos ng buong puso mo, at ng buong kaluluwa mo, at ng buong pagiisip mo, at ng buong lakas mo. (Marcos 12:30)
And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength; this is the first commandment. (Mark 12:30)