lingo语法错误,错在何处?

题目

lingo语法错误,错在何处?
w1=100*k*x11+210*k*x13+250*k*x14+290*k*x15+300*k*x16+430*k*x18+450*k*x19+500*k*k10+90*k*x21+180*k*x22+240*k*x24+305*k*x26+380*k*x27+435*k*x28+490*k*x20+170*k*x32+210*k*x33+245*k*x34+285*k*x36+400*k*x37+450*k*x39+480*k*x30;
w2=10*k*y12+14*k*y13+17*k*y14+13*k*y15+10*k*y21+8*k*y22+9*k*y24+16*k*y25+15*k*y31+16*k*y32+9*k*y33+15*k*y34;
w3=k*s1*s1*s1/190+152000*k*s1*(1/k-s1/3800)^2+7/720*s2*s2*s2+252000*s2*(1/k-s2/3600)^2+9/728*k*s3*s3*s3+327600*k*s3*(1/k-s3/3640)^2+k*s4*s4*s4/65+325000*k*s4*(1/k-s4/3250)^2+3/157*k*s5*s5*s5+376800*k*s5*(1/k-s5/3140)^2+2/167*k*s6*s6*s6+400800*k*s6*(1/k-s6/3340)^2+15/628*k*s7*s7*s7+471000*k*s7*(1/k-s7/3140)^2+8/323*k*s8*s8*s8+516800*k*s8*(1/k-s8/3230)^2+9/374*k*s9*s9*s9+673200*k*s9*(1/k-s9/3740)^2+1/39*k*s10*s10*s10+780000*k*s10*(1/k-s10/3900)^2;
w4=10000*k
s1=j11+j12+j13+j14+j15;
s2=j21+j22+j23+j24+j25;
s3=j31+j32+j33+j34+j35;
s4=j41+j42+j43+j44+j45;
s5=j51+j52+j53+j54+j55;
min=w1+w2+w3+w4
k*x11

答案