2 1/4:2 4/7+6,5=

9/4 : 18/7 +65/10 = 9/4 *7/18 +65/10= 7/8+65/10= 590/80= 7,375

5 1/4 : 3 3/7 + 6 1/2 = 5 1/4 * 7/24 + 6 1/2 = 126/24 * 7 / 24 + 6 1/2 = 36 , 75 + 6 1/2 = 43,25

2 1/4:2 4/7+6,5=9/4:18/7+6i1/2=9/4*7/18+13/2=7/8+13/2=7/8+52/8=59/8=7i3/8 :))