Find and correct the errors in the following mathematical statement: Substituting x=-3 in (c) `x^2+5x` given `(-3)^2+5(-3)`=-9-15=-24.

Find and correct the errors in the following mathematical statement: Substituting x=-3 in (b) x^2-5x+4 given (-3)^2-5(-3)+4 =9-15+4=-2.

Find and correct the errors in the following mathematical statement: Substituting x=-3 in (a) x^2+5x+4 given (-3)^2+5(-3)+4 =9+2+4=15.

Find and correct the errors in the following mathematical statement: 2x+3y=5xy

Find and correct the errors in the following mathematical statement: 3x+2x=5x^2

Find and correct the errors in the following mathematical statement: x+2x+3x=5x

Find and correct the errors in the following mathematical statement: 4(x-5)=4x-5

Find and correct the errors in the following mathematical statement: '3 x^2/3x^2' = 0

Find and correct the errors in the following mathematical statement: 3/(4x+3)=1/4x .

Find and correct the errors in the following mathematical statement: (4x+5)/4x =5.

Find and correct the errors in the following mathematical statement: (7x+5)/5 =7x.