Measurement on $$\pi ^ + \pi ^ - \pi ^0 \pi ^0 $$ , $$\pi ^ + \pi ^ - \pi ^ + \pi ^ - \pi ^0 $$ , $$\pi ^ + \pi ^ - \pi ^ + \pi ^ - \pi ^0 \pi ^0 $$ , $$\pi ^ + \pi ^ - \pi ^ + \pi ^ - \pi ^ + \pi ^ - $$ production cross-sections in e+e− annihilation at (1.45÷1.80) GeV c.m. Energyproduction cross-sections in e+e− annihilation at (1.45÷1.80) GeV c.m. Energy