I need an answer for the program below

I couldn't find the answer for t1. Here int means integral.

a1=30;
b1=5;
c1=5; 
c2=10; 
c3=12;
c4=8;
T=12;
syms t1
ft1=a1+b1.*t1;
D1='(ft1./T).*[c1.*(exp((al.*t1^2)./2)-1)+c2.*int((exp((al.*t1^2)./2)-1)).*dt+c3.*exp((del.*(t1-T))).*(t1-T)+c4.*exp((del.*(t1-T)))';
t1=solve'D1'

[Torsten]

Please show the equation you are trying to solve in a mathematical notation.

Your D1, especially the term int((exp((al.*t1^2)./2)-1)).*dt, does not make much sense.

Further, al, dt, del are undefined.

[M.Rameswari Sudha]

I want to integrate this term int((exp((al.*t1^2)./2)-1)).*dt by using matlab, and then simultaneously I want to find t1 value from that equation. dt is a differential with respect to the variable t1 of integration. Here I want to change ft1 in different function of t1. so I didn't integrate the term int((exp((al.*t1^2)./2)-1)).*dt. sorry I forget to give the valu for al and del. al =0.01; del= 0.2; Kindly give the solution for the above equation.