Pre-AlgebraChallenge SharePre-Algebra · Challenge problemEvaluate (20+30+40+50)2−42\left(2^{0} + 3^{0} + 4^{0} + 5^{0}\right)^{2} - 4^{2}(20+30+40+50)2−42.Check Show answer Walk through it step by step Practice more like this