HELP! potrzebuje na szybko !!! daje naj!! a za to aż 20 pkt ;) i proszę o obliczenia a nie o same wyniki ;3

(7 - 5 2/5) x 1/4 = 1 3/5 x 1/4 = 8/5 x 1/4 = 8/20 = 2/5 (7/9 - 47/72) : 1 1/4 = (56/72 - 47/72) : 1 1/4 = 9/72 x 4/5 = 9/90 = 1/9 6 x (1 1/3)² = 6 x 16/9 = 32/3 = 10 1/3 (5/7)² : 5/7 = 25/35 x 7/5 = 5/7 (1/3 - 1/4)² = 1/12 x 1/12 = 1/144 (2/5)² + 4 1/2 x 2 2/3 = 4/25 + 4 1/2 x 2 2/3 = 4/25 + 4/3 = 12/75 + 100/75 = 112/75= 1 27/75 5 x (1/2)² + 15 x (1/3)² =  5 x 1/4 + 15 x 1/9 = 5/4 + 5/3 = 15/12 + 20/12 = 35/12 = 2 11/12 1/9 - (5/6 - 2/3)²= 1/9 - ( 10/12 - 8/12)² = 1/9 - 2/12² = 1/9 - 1/6 = 3/4