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(0.6*(0.05-(2.49*(0.7*x+0.5))))/((0.05-(2.4*(0.7*x+0.5)))*(0.05-(2.4*(0.7*x+0.5)))+2.49*(0.1*x-(2.49*x)+0.35)*(0.1*x-(2.49*x)+0.35)) = -0.4
ln(x+1) = 2
A*D*sin(((50*P)/L)*x)
8/7 = 0
A*D*sin((50/4)*x)
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