1) 22*(25+a-b) = 550 + 22a-22b
2) 18*(x+y-15) = 18x + 18y - 270
1) 26*98+52 = 26*(98+2) =2600
2) 205*199+205 = 205*(199+1) = 41000
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1) 22*(25+a-b) = 550 + 22a-22b
2) 18*(x+y-15) = 18x + 18y - 270
1) 26*98+52 = 26*(98+2) =2600
2) 205*199+205 = 205*(199+1) = 41000