Please help me on solving this two questions. 1. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, x) 2. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, y) 3. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, s) 4. sum(3*x[r]+1, r <> 5) 5. sum(3*x[`#msup(mi("r",fontstyle = "italic"),mo("&uminus0;",fontstyle = "italic"))`]+1, r = 5)

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