Решите пожалуйста, быстроооо. Даю 19 балов.

а) n³ - [latex] \frac{4}{9} [/latex] 1) -1 - [latex] \frac{4}{9} [/latex] = -1[latex] \frac{4}{9} [/latex] 2) -[latex] \frac{1}{27} [/latex] - [latex] \frac{4}{9} [/latex] = -[latex] \frac{1}{27} [/latex] - [latex] \frac{3}{27} [/latex] = [latex] \frac{4}{27} [/latex] б) 4 - m² 1) 4 - 1 = 3 2) 4 - [latex] \frac{36}{49} [/latex] = 3[latex] \frac{49}{49} [/latex] - [latex] \frac{36}{49} [/latex] = 3[latex] \frac{13}{49} [/latex]