47 *42+42*153=? 57*81-39*81=? №1 61*45+55*61=? 38*39-38*20=? №2 7*55+7*45+3*45+3*55=? 8*2+2*92+8*98+2*8=? 37*59+37*41+63*59+41*63=? 356*73+644*27+73*644+27*356=?

61*45+55*61=6100
38*39-38*20=722
7*55+7*45+3*45+3*55=1000
8*2+2*92+8*98+2*8=1000
37*59+37*41+63*59+41*63=10000
356*73+644*27+73*644+27*356=100000