(-5x-1/3y)(3/5x-3/4y+2)
=-3x²-9/5xy+15/4xy+1/4y²-10x-2/3y
=-3x²-36/20xy+75/20xy+1/4y²-10x-2/3y
=-3x²+39/20xy+1/4y²-10x-2/3y