[math]\left(4x-1\right)+\left(3x+1\right)[/math]
[math]\left(2x+3\right)-\left(x-3\right)[/math]
[math]\left(2x-5y+8\right)-\left(3x+5y+2\right)[/math]
[math]2\left(x-7\right)-5\left(-x+2\right)[/math]
[math]15\left(x-3y+2\right)+3\left(-5x+15y-10\right)[/math]
[math]3\left(x-4\right)=2x-15[/math]
[math]2\left(x-9\right)-3\left(x+2\right)=4\left(x-1\right)[/math]