20y+7=51
$x^{2}$ =2x+5
solve x
$ a + b = 8 $, $ A .b = 12 $, evaluate $ a $, $ b $
4*2^3
4x-3=2x+3
lowest common multipul of 639 and 210
345 base 8 + 453 base 8
if a+b=8 and Axb=12 find a and b
40rsquared+16r
(2n^7p^-4)^-3
