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Simplify: (5+10) − (−2−9)\left(5+10\right)\ -\ \left(-2-9\right)(5+10) − (−2−9)
Simplify: 7− (7+9)7-\ \left(7+9\right)7− (7+9)
Simplify: −10+5−3-10+5-3−10+5−3
Simplify: (13−4)+(−8+4)\left(13-4\right)+\left(-8+4\right)(13−4)+(−8+4)
Simplify: (10−8) + (−15+10)\left(10-8\right)\ +\ \left(-15+10\right)(10−8) + (−15+10)
Simplify: −21−17−11-21-17-11−21−17−11
Simplify: (15+8)−(−12−9)\left(15+8\right)-\left(-12-9\right)(15+8)−(−12−9)
Simplify: −20−10−14-20-10-14−20−10−14
Simplify: −14+9−7-14+9-7−14+9−7
Simplify: 5−(5+3)5-\left(5+3\right)5−(5+3)
It is done.