module test(in, out, clk, reset);
input in, reset;
output reg out;
input clk;
reg signed [3:0] a;
reg signed [3:0] b;
reg signed [3:0] c;
reg [5:0] d;
reg [5:0] e;

always @(clk or reset) begin
    a = -4;
    b = 2;
    c = a + b;
    d = a + b + c;
    d = d*d;
    if(b)
        e = d*d;
    else 
        e = d + d;
end
endmodule