Simplify. Use positive exponents for any variables. \( \left(-3 x^{2} y\right)\left(5 x^{3}\right)\left(-4 x y^{6}\right) \)

Calculate or simplify the expression \( (-3*x^2*y)*(5*x^3)*(-4*x*y^6) \). Simplify the expression by following steps: - step0: Solution: \(\left(-3x^{2}y\right)\times 5x^{3}\left(-4xy^{6}\right)\) - step1: Remove the parentheses: \(-3x^{2}y\times 5x^{3}\left(-4xy^{6}\right)\) - step2: Rewrite the expression: \(3x^{2}y\times 5x^{3}\times 4xy^{6}\) - step3: Multiply the terms: \(60x^{2}yx^{3}\times xy^{6}\) - step4: Multiply the terms: \(60x^{2+3+1}y\times y^{6}\) - step5: Add the numbers: \(60x^{6}y\times y^{6}\) - step6: Multiply the terms: \(60x^{6}y^{1+6}\) - step7: Add the numbers: \(60x^{6}y^{7}\) The simplified expression using positive exponents is \(60x^{6}y^{7}\).