(3/1-5/1)x5^2÷l-3/1l+(-5/1)^0+(-0.25)^2013x4^201

Question

(3/1-5/1)x5^2÷l-3/1l+(-5/1)^0+(-0.25)^2013x4^201

Answer 1

(3/1-5/1)x5^2÷l-3/1l+(-5/1)^0+(-0.25)^2013x4^2013
=15/2×25÷3/1+1-（0.25×4）^2013
=3/10÷3/1+1-1
=10