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a = tan(2.4);
b = sqrt(2 + cos(1.3));
c = (sin(1.6*pi) - 2/tan(2.8))^2;
d = exp(-1/4);
e = 4 + sin(5*pi);

y = (a + b)/c - d*e

a = sqrt(log(5.6));
b = cos(8.4);
c = sqrt(sin(9.1)/log(3.4));
d = sqrt(log(5.26)/log(3.5));

y = (a/b + c)/d