1)3*(х+5)+7х
2)12*(4+у)-5у
3)6х+4*(2х+7)
4)9у+2*(6у+5)
5)9*7+31*7
6)52*4-32*4
7)15*(2х+у)+3(х-4у)
8)4*(22а+3в)-80а-10в
9)17*(2с-3d)+6c+60d
10)4c*25a
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