1.\:\:factor\:(2x+3)^{2}- (a-1)^{2}
2.\:\:factor\:(7x+10)^{2}-(6y+8)^{2}
3.\:\:factor\:(3x-4)^{2}-(8y+8)^{2}
4.\:\:factor\:(3x-10)^{2}-(7y-1)^{2}
5.\:\:factor\:(5x+2)^{2}-(2y-5)^{2}
6.\:\:factor\:(7x-5)^{2}-(10y-3)^{2}
7.\:\:factor\:(2x+3)^{2}-(3y+2)^{2}
8.\:\:factor\:(4x-2)^{2}-(8y-3)^{2}
9.\:\:factor\:(6x-4)^{2}-(5y-10)^{2}
10.\:\:factor\:(2x+4)^{2}-(7y+1)^{2}
