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| (2*(r+3))/((r^2-r-12)(r+3))+(r*(r^2-r-12))/((r^2-r-12)(r+3)) - add fractions | | (2)/(r^2-r-12)+(r)/(r+3) - add fractions | | (y)/(y-x)+(x)/(y+x) - add fractions | | (y)/(y-x)-(x)/(y+x) - subtract fractions | | (2x)/(x+1)+(5)/(x^2-1) - adding of fractions | | (7z)/(7z-1)-(1)/(1-7z) - subtract fractions | | (7)/(6)/(6)/(7) - divide fractions | | (5)/(6)+(7)/(8) - adding of fractions | | (7x)/(2)-(11)/(2) - subtraction of fractions | | (6)/(35)/(18)/(7) - dividing of fractions | | (-6)/(35)/(18)/(7) - divide fractions | | (1)/(2)-(4)/(5) - subtraction of fractions | | (6a)/(-1)+(9)/(-8^2) - adding of fractions | | (-5)/(2x)*(y)/(-1) - multiplication of fractions | | (5)/(6)-(2)/(9) - subtract fractions | | (1)/(1)+(2)/(3) - adding of fractions | | (x)/(1)+(2)/(3) - add fractions | | (x)/(1)+(2x)/(3) - addition of fractions | | (-8)/(x-2)+(1-2x)/(x) - addition of fractions | | (-8)/(x-2)+(1-2x)/(x) - adding of fractions | | (3)/(4)/(7)/(12) - divide fractions | | (3)/(14)*(7)/(10) - multiply fractions | | (5)/(4)*(7)/(10) - multiply fractions | | (-2)/(3)+(3)/(5) - adding of fractions | | (1)/(16)-(3)/(8) - subtraction of fractions | | (3)/(4)+(200)/(200) - adding of fractions | | (20)/(18)/(1)/(2) - dividing of fractions | | (20)/(18)+(1)/(2) - add fractions | | (20)/(18)/(1)/(2) - divide fractions | | (1)/(2)-(2)/(5) - subtraction of fractions | | (1)/(6)/(3)/(7) - dividing of fractions | | (8)/(8)-(7)/(8) - subtraction of fractions |