Express 82x+18^{2x+1}82x+1 in the form 2y2^y2y, giving y y\,y in the form ax+bax+bax+b, where a a\,a and b b\,b are constants.
134 exam-style questions on Edexcel AS Level Maths Algebraic Expressions, covering 1.1 Index Laws, 1.2 Expanding Brackets, 1.3 Factorising, 1.4 Negative and Fractional Indices, and 1.5 Surds. Each one has a worked solution and a mark scheme showing where the marks go.