25 7/32- 21 1/24=807/32-505/24=2421-2020/96=401/26
19 7/20-9 1/30=387/20-271/30=1161-542\60=619/60
73 5/24-58 36/19=1757/24-1138/19=33383-27312/456=6071/456
91 37/54- 47 11/45=4951/54-2126/45=221445-114804/2430=106651/2430
<span>(5<span>tan^2</span><span>(5x)</span>+5)/(</span><span>tan<span>(5x<span>))</span></span></span>
упрост.: а)-7х+ 3х+= -4х,,,,,б)2а-а + 42-5=а+37
63:y=18-9
63:y=9
y=63:9
y=7
--------
63:7=18-9
9=9