4. Collect like terms: a) 3x+4x b) 8x-3x+2-5 c) 2y+3x+4y-x+10 d) 3x^2+5x+2x^2+7

## Step 1: Combining terms### In , both terms contain . Add the coefficients: . The combined term is .## Step 2: Combining and constant terms### In , combine the terms: . Combine the constant terms: . The simplified expression is .## Step 3: Combining , , and constant terms### In , combine the terms: . Combine the terms: . The constant term is . The simplified expression is or .## Step 4: Combining and terms### In , combine the terms: . The term is . The constant term is . The simplified expression is .