Разложите на множители 29-33

29.(6.25x+10)(6.25x-10) 30.(x+y-z)(x+y+z) 31.(a2+b2)(a2-b2) 32.(2p-m-p+2m)(2p-m+p+2m) 33.(3a-2b-4a+b)(3a-2b+4a+b) 34.(5z-2t+3z)(5z+2t+3z)