Выполните действия
1 ) [tex] \frac{13+5n-8k}{40n} + \frac{3-n}{40n} =[/tex]
2 ) [tex] \frac{(3t-2a ^{2}) ^{2} }{34a ^{2}t } - \frac{(2a ^{2}+3t) ^{2} }{34a ^{2}t } [/tex]
3 )[tex] \frac{13xy ^{2}-14 }{26x ^{2}y-104x ^{4}y } - \frac{14-52x ^{3}y ^{2} }{104 x^{4}y -26 x^{2} y} [/tex]
4) [tex] \frac{68f-18-77f ^{2} }{24f-16-9f ^{2} } + \frac{(8f-3 )^{2} }{(3f-4) ^{2} } - \frac{(2f-5) ^{2} }{(4-3f) ^{2} } [/tex]