10, Calculati: a) √3-√5 + √3+√5|-13-2√5; b) |2-√5|-|√3+√5 + 1-√3-√3-3 c) √3+√2-√3+5|-|1-√2+1-5; d) √2-√3+2-√3+1-√√2-1-31​