Write the following in the expanded form:

(i) (a+25b+c)^{2}

(ii) (2a-3b-c)^{2}

(iii) (-3x+y+z)^{2}

(iv) (m+2n-5p)^{2}

(v) (2+x-2y)^{2}

(vi) (a^{2}+b^{2}+c^{2})^{2}

(vii) (ab+bc+ca)^{2}

(viii) (x/y+y/z+z/x)^{2}

(ix) (a/bc + b/ca + c/ab)^{2}

(x) (x+2y+4z)^{2}

(xi) (2x-y+z)^{2}

(xii) (-2x+3y+2z)^{2}